Cita APA

Billington, R. A. (1962). The far western frontier: 1830-1860. New York: Harper Torchbooks , Harper & Row.

Citación estilo Chicago

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

Cita MLA

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