You may be asked to use scholarly, peer reviewed journal articles (sometimes called refereed articles or scholarly articles) for your assignment.
Many scholarly databases, like Discovery, have filter options to limit your search results to peer reviewed articles.
Try a multi-disciplinary scholarly database that only includes peer reviewed sources, like Scopus or Web of Science.
The C-R-A-P Test can help you determine if a source you have found is reliable and relevant.
C-R-A-P stands for Currency, Reliability, Authority and Purpose.
When was the source created?
Are references or citations provided in the source?
Who is the creator or author?
Who is the audience?
You can find what other scholars think of the article or book you're reading by checking works that cite it.
When a work is cited by another author this means it has been read and considered it, and included in the reference list of the new work. It will tell you if it other scholars agree or disagree with their work.
Some scholarly databases will provide a link to publications that have cited the work you're looking at.
Learn to question and analyse what you are reading. Developing critical literacy is key to your success at University.
Consider what's relevant to your audience when analysing data.