APA (7th ed.) Citation

Heffner, R. D. (1956). A documentary History of the united states. The New American Library.

Chicago Style (17th ed.) Citation

Heffner, Richard D. A Documentary History of the United States. New York: The New American Library, 1956.

MLA (9th ed.) Citation

Heffner, Richard D. A Documentary History of the United States. The New American Library, 1956.