Journal articles are essential sources for current information on very focused topics. You can find articles in scholarly journals, trade journals, newspapers, and popular magazines. However, very often you will be expected to use articles from scholarly journals (also known as peer-reviewed or refereed journals) for research papers because they must be reviewed by subject experts before they are published. Thus, articles presented in scholarly journals are more authoritative than those in other types of publications.
Below are some examples of databases that index articles in scholarly journals:
Relevant Interdisciplinary Databases