Cita APA

Billington, R. A. (1959). The Westward movement in the United States: Ray Allen Billington. Van Nostrand.

Citación estilo Chicago

Billington, Ray Allen. The Westward Movement in the United States: Ray Allen Billington. Princeton, N.J.: Van Nostrand, 1959.

Cita MLA

Billington, Ray Allen. The Westward Movement in the United States: Ray Allen Billington. Van Nostrand, 1959.

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