Cita APA (7a ed.)

Billington, R. A. (1962). The Far Western Frontier, 1830-1860. Harper & Row.

Cita Chicago Style (17a ed.)

Billington, Ray Allen. The Far Western Frontier, 1830-1860. New York (N.Y.) ; Evanston ; London: Harper & Row, 1962.

Cita MLA (8a ed.)

Billington, Ray Allen. The Far Western Frontier, 1830-1860. Harper & Row, 1962.