APA (7th ed.) Citation

Billington, R. A. (1956). The far western frontier / 1830-1860. Harper.

Chicago Style (17th ed.) Citation

Billington, Ray A. The Far Western Frontier / 1830-1860. New York: Harper, 1956.

MLA (9th ed.) Citation

Billington, Ray A. The Far Western Frontier / 1830-1860. Harper, 1956.

Warning: These citations may not always be 100% accurate.