Cita APA (7a ed.)

O'Connor, J. R., & Contreras, G. (1991). Exploring American history. Globe Book.

Cita Chicago Style (17a ed.)

O'Connor, John R., y Gloria Contreras. Exploring American History. Englewood Cliffs, NJ: Globe Book, 1991.

Cita MLA (9a ed.)

O'Connor, John R., y Gloria Contreras. Exploring American History. Globe Book, 1991.