Cita APA (7th ed.)

Billington, R. A. (1966). The frontier thesis: Valid interpretation of American historyn. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Billington, Ray Allen. The Frontier Thesis: Valid Interpretation of American Historyn. New York: Holt, Rinehart and Winston, 1966.

Cita MLA (9th ed.)

Billington, Ray Allen. The Frontier Thesis: Valid Interpretation of American Historyn. Holt, Rinehart and Winston, 1966.