If you study at college or university, there is no way you could avoid writing a research paper or an essay.
Therefore, we can list a few sources that cannot be used for research papers: Even though the list of unacceptable sources is given, the question is still there: where do students find peer-reviewed articles and academic books?
The new sources might contradict the previous ones, and in the end you will successfully formulate your own hypothesis.
The more sources you read, the bigger picture you can have and the easier it will be for you to set your own research to a larger context.
In case you have found a relevant article and need more similar sources, you can click on ‘Related articles’ right underneath the title of the found article.
Google Scholar will provide you with the list of similar works discussing the same subject.