Cita APA (7th ed.)

Crow, H. L., & Trunbull, W. L. (1972). American history: A problems approach. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Crow, Herman L., i William L. Trunbull. American History: A Problems Approach. Nueva York: Holt, Rinehart and Winston, 1972.

Cita MLA (9th ed.)

Crow, Herman L., i William L. Trunbull. American History: A Problems Approach. Holt, Rinehart and Winston, 1972.