Cita APA (7a ed.)

Schwartz, M., & O'Connor, J. R. (1973). Exploring the western world: Its peoples, cultures and geography. Globe Book.

Cita Chicago Style (17a ed.)

Schwartz, Melvin, y John R. O'Connor. Exploring the Western World: Its Peoples, Cultures and Geography. New York [u.a.]: Globe Book, 1973.

Cita MLA (9a ed.)

Schwartz, Melvin, y John R. O'Connor. Exploring the Western World: Its Peoples, Cultures and Geography. Globe Book, 1973.