Sources should be carefully evaluated for currency, reliability, and to check for bias. Using library databases is one way to ensure that your sources are valid published sources. Databases enable you to limit your search to peer-reviewed articles, which are appropriate for academic research. Some web sites are valid sources and some are not. All sources are likely to have some sort of bias. Here is a helpful guide to evaluating sources: https://library.oru.edu/informationevaluation