Cita APA (7a ed.)

Holt, S., & O'Connor, J. R. (1987). Exploring world history: A global approach. Globe Book.

Cita Chicago Style (17a ed.)

Holt, Sol, y John R. O'Connor. Exploring World History: A Global Approach. New York [u.a.]: Globe Book, 1987.

Cita MLA (9a ed.)

Holt, Sol, y John R. O'Connor. Exploring World History: A Global Approach. Globe Book, 1987.