Periodicals are newspapers, magazines, and journals that are published in intervals (periodically). Periodicals contain articles and are good sources of information for research.

Some examples of periodicals include

· Time, a magazine

· Wall Street Journal, a newspaper

· The College Mathematics Journal, a scholarly journal

Periodicals are available in a variety of formats including:

· print (paper) format

· microfilm format

· microfiche format

· electronic format