APA (7th ed.) Citation

Billington, R. A. (1967). Westward expansion: A history of the American frontier (3d ed.). Macmillan.

Chicago Style (17th ed.) Citation

Billington, Ray Allen. Westward Expansion: A History of the American Frontier. 3d ed. New York: Macmillan, 1967.

MLA (8th ed.) Citation

Billington, Ray Allen. Westward Expansion: A History of the American Frontier. 3d ed. Macmillan, 1967.