Reference texts like encyclopedia or handbooks can be a great way to learn general information on a field or topic.
To find specific articles in encyclopedias, use UC Library Search.
Use quotation marks to search your term as a complete phrase. Use the asterisk * wildcard to search all variant endings of your word: feminis* will retrieve feminist, feminism, etc.
For example:
audience
"news media"
When you get your results, select Resource Type > Reference Entries from the left toolbar.