APA (7th ed.) Citation

Channing, E. (1949). A history of the United States. Macmillan.

Chicago Style (17th ed.) Citation

Channing, Edward. A History of the United States. New York: Macmillan, 1949.

MLA (9th ed.) Citation

Channing, Edward. A History of the United States. Macmillan, 1949.