If your professor asks you to find "scholarly" or "peer reviewed" journal articles, be sure the article you find is from a source that has gone through the peer review process. Many databases offer a search filter to limit to only journals that are scholarly or peer reviewed. You can also check the journal title in the Ulrich's database (see link below) to see if it is peer reviewed.
Use Discover! to search across multiple databases with a single search (see link below)
For a full listing of databases, browse the Databases A-Z List (see link below)
Below are some databases to start your research:
For a full listing of peer-reviewed journals carried by the Leatherby Libraries, browse the Journal A-Z List on Publication Finder (see link below).
Below are journals in the field of Holocaust Studies: