There are 2 approaches that you can use to find articles in professional journals:
1. Use the "Articles" tab to find an ARTICLE DATABASE to search a large number of journals all at once.
2. Use the "E-Journals" tab to go a SINGLE PUBLICATION directly and search for articles within that publication.
Some article databases provide a limiting feature that will select results appearing only in peer-reviewed journals;
UW Libraries Search (below) has a peer-review feature on its column of results limiters.
Other databases that have peer review limiting: