Cita APA (7a ed.)

Fenton, E., Aberg, S., & Powell, D. (1969). 32 problems in world history: Source readings and interpretations. Scott, Foresman.

Cita Chicago Style (17a ed.)

Fenton, Edwin, Sherill Aberg, y Daniel Powell. 32 Problems in World History: Source Readings and Interpretations. Glenview, Ill: Scott, Foresman, 1969.

Cita MLA (9a ed.)

Fenton, Edwin, et al. 32 Problems in World History: Source Readings and Interpretations. Scott, Foresman, 1969.