Communication researchers rely heavily on scholarly peer-reviewed journal articles. Because of this, these databases are great starting points.
Quick Search is a great place to find journal articles, too: use search terms related to your topic and limit to journal articles under 'Content Type' and 'Journalism and Communications' under discipline.
You may find sources in Google Scholar that aren’t available through the UTSA Libraries. Google Scholar is also awesome for identifying newer articles that have cited an article and for finding related research.