Collecting literature for a thesis is an arduous task that to perform it in the best possible way requires following certain steps.
This collection begins with the search for information at the national level and also at the international level. All this bibliography that is sought to be made under the slogan that it is of the same theme of the thesis that is intended to be performed. It can be very similar information or information approaching.

The key is to initiate an organized and well-structured collection with respect to the data that exists to date in relation to the information to be drilled down.

Skills needed to make a good collection

Conducting a bibliographic review and subsequent collection involves the ability to judge and developed reading and writing skills. Since the task of documentary research requires being able to condense a large volume of information that is collected from many varied sources that must then go through a process of comparison and relationship. To select the appropriate information to produce a coherent text, which compactly organizes the results and conclusions to which it is reached.

Type of information for the bibliography of a thesis

The data that can be collected for a thesis, we could group it into two:

Primary information: All the data that the student obtains directly from a reality investigation.
Secondary information: This data is usually acquired already processed and processed. They are extracted from scientific documents written such as: Books, articles, academic papers, etc.

Where does bibliographic research begin?

Secondary information is the primary objective at the time of information collection. Because thanks to this data you can access a broader view of the status of the topic or the problem that has been chosen to make the thesis.
It always takes as a horizon that not only is it about making a summary of the information available, but also it’s about making a comparison between the different sources found and recognizing the relationships they have. It is also required to critically analyze information as it is collected and considering that it is useful for answering questions from the initial investigation.

Now that I’ve made an introduction to the initial points of an investigation. I’ll continue to explain the next step.

Sites to collect academic production related to the topic to be investigated
These sites I mention below are intended to make it easier to collect bibliography and have works that mostly have a very important scientific rigor.

Sito, Web of Science (WoS)

It is an international site that contains scientific articles granted by Clarivate Analytics (a company engaged in data collection, including scientific works). Its reason is to offer easy access to a database, where quotes from scientific articles or books are found. It usually covers most academic knowledge.

Scientific Electronic Library Online Page (SciELO)

On this page are the publications of scientific journals in digital format His motivation is to accumulate a large collection of scientific journals. Which offers them to the Spanish community and the Ibero-American space.

Higher Council for Scientific Research (CSIC)

The CSIC contains an important database of scientific research from Spain. It collects scientific works from 1970 to today. Much of this database is made up of Spanish scientific journals.

In recent years, in addition to these sites that contain a very large flow of scientific work. Social networks were emerging focused on research and science. On these sites any scientist can create a profile and share their productions through the platform.

Some of the best known in this category are:

The network of Academia.edu

Free scientific material can be found on this social network. According to your data you have more than 22 million articles and more than 33 million academics who read and participate on this site.

There’s also Researchgate

It is a site with more than 135 million pages of publication that will bring you up to date with the last that is happening in the field of your interest. It will also put you in touch with a large scientific community.

Finally within this group of research and bibliography collection pages I will mention the best known, which is:

Google Academic

It is a secondary search engine that is focused on locating academic documents.

How to perform a quality search?
Once the most important websites are available. The main thing is to be able to perform a quality search. For this I will leave you some tips that you may know and that are key to perform an optimal search.

Manually select documents from a reading of their abstract or abstract summaries.
Consider those items that have the most mentions or quotations.
Select items that were used by high-impact magazines.

How to collect the bibliography?

The information that is required is always spread across different publications and files. As well as libraries or databases.

Once the information that is available for the preparation of the thesis is known. It proceeds to the reading and then to a second reading where the collection takes place. It is very important to collect the bibliography on some computer support with synchronization to the cloud so as not to lose the documents that were of interest. By the time I make the thesis.
It is important to have a draft with the general aspects of what you want to achieve in the collection. This helps to select and group the collected bibliographies.

During reading it is important to analyze and evaluate whether the source being taken as valid can support its value. Remember that the perspective from which the thesis should be focused is a well-founded and logical position.

How to estimate the value of a bibliography?
As the main rule, only focus on articles that are very important in the community and the second thing is to review other works, which were done by the authors of the same.

How to collect and refer to collected sources?

References to all material used must provide the exact information from which it was taken.
There is a browser plugins and computer program that is very good for saving references, this is ZOTERO.

Now that we’ve reached the end of these recommendations and tips, I’ll give you one last appreciation. The information obtained on the internet is not 100% reliable. The most reliable information is that obtained from sites or pages of institutions committed to science.