Cita APA (7th ed.)

Heffner, R. D. (1954). History of the United States. The New American Library.

Cita Chicago (17th ed.)

Heffner, Richard D. History of the United States. New York: The New American Library, 1954.

Cita MLA (9th ed.)

Heffner, Richard D. History of the United States. The New American Library, 1954.