Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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