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Citing the Source

Pre-Statehood Era: 1700-1818

Early Statehood: 1818-1861

Civil War Era: 1861-1865

Late 19th Century: 1866-1900

Early 20th Century: 1900-1914

World War I: 1914-1918

Roaring Twenties: 1918-1929

Great Depression: 1930-1941

World War II: 1941-1945

Cold War Era: 1946-1991

Millennium: 1991-Present

Lesson Plans


Citation Styles

Chicago Manual of Style Guidelines

  • The Chicago Manual of Style is typically used in humanities departments, such as history, the arts, and literature. The manual is currently in its 16th edition, and it is important to check both online sources and the printed manual to ensure correct citation. 

APA Style Guide

  • The American Psychological Association style guide is used most often by psychologists, anthropologists and business associations. The style guide is currently in its 6th edition, but check for updates often. 

 MLA Style Guide

  • The Modern Language Association style guide is used by many in the humanities and most especially in English departments. The handbook for writers is in its 6th edition. 

Citing Primary Documents

Library of Congress: On Citing Primary Sources

  • The Library of Congress has a variety of resources for teachers including this guide to citing primary sources, either in MLA or Chicago style

American Library Association

  • A division of the ALA, the Reference and User Services Association, compiled a site about what primary sources are, how they can be used in classrooms, and properly citing them.

Citations on Past Tracker

  • All citations on Past Tracker should follow the most up-to-date Chicago Manuel of Style, unless otherwise listed. Any questions about references or citations should be referred to the site administrator.