These databases have scholarly journal articles and magazine articles in many different subject areas, including interdisciplinary subjects. JSTOR includes many older articles that are useful for researching the history of a topic.
The American Journalims Review became an online-only publication in July of 2013.
Search for articles from the previous print version here: http://ajrarchive.org/
Remember to give credit to the original source when you use someone else's work or idea, whether you use a direct quote or paraphrase. Most style guides require some form of citation in the text of your paper as well as at the end in a bibliography or list of references.
Several key communication studies journals have moved entirely online, and a few others are scattered among different databases. Here are links to some core journals.
Search these databases to find online newspaper articles.