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MLA Citation Guide (MLA 9th Edition): Source Types

A guide to citing sources in MLA style.

The Information Cycle

What is the information cycle?

"Information cycle" refers to the way that information is produced and distributed and how it changes over time. It is often used to describe the progression of media coverage as it relates to a newsworthy topic or event. Understanding the information cycle will help you know what kinds of information may be available on your topic as you locate and evaluate research sources. 

The progression of the information cycle is connected to the amount of time after an event:

Same Day: social networking sites (e.g., Twitter, Facebook, Instagram), mobile communication, TV, radio, Internet news sites

Next Day/Week Of: newspapers

Following Weeks: popular magazines, general government information

Six Months Later: Scholarly journals (allowing time for the peer review process)

One+ Year Later: Books, government reports, reference material

Source Types & Their Uses

 
Source Type Information Use Example(s)
Websites Websites provide access to information, images, videos, and audio
  • to locate government information/documents
  • to find current information
  • when you have plenty of time to evaluate the site's credibility

U.S. Bureau of Labor 

US Census Bureau

United Nations

Newspapers

A collection of articles written by journalists about current events, typically published daily
  • to locate up-to-date information about a current event
  • to find local information
  • to read editorials, commentaries, or expert/popular opinions

Gale OneFile: News

Newspaper Source

Magazines/

Periodicals

A collection of articles and images about a variety of popular topics and current events. Articles are written by journalists for the general population
  • to find information and opinions about popular topics or current events
  • to learn more about a topic if you are not an expert in the field

Newsweek

Time Magazine

Psychology Today

The Atlantic

Trade Publications

 

A regularly published collection of articles that addresses topics of interest to members of a particular profession such as law enforcement
  • to find industry-specific information, news, trends, or best practices

Corrections Today

Library Journal

 

Scholarly/Peer Reviewed Article

Articles written by scholars or experts in the field. Sometimes called "academic articles," they can be found using databases and cover a wide range of topics. They can either be original research or analysis of an issue or topic. 
  • to locate original research
  • to find specific studies within a field of research
  • to find literature reviews on a topic

Academic Search Complete (EBSCOhost)

ProQuest

JSTOR

Books & eBooks

Provide in-depth coverage of a subject and often include historical or contextual information regarding a topic
  • to put a topic in context
  • to learn the history of a topic
  • to find in-depth analysis or summaries of a topic

EBSCO Ebook Collection

JSTOR

Reference Material Items such as dictionaries, encyclopedias, and handbooks are considered Reference materials. 
  • as a starting point for research
  • for background research on a topic
  • to locate key terminology, people, or dates
Encyclopedia Britannica Online

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