Cita APA (7a ed.)

Speer, R. K., Lussenhop, R., & Smither, E. L. (1946). Living in ancient times. Johnson Publishing Co..

Cita Chicago Style (17a ed.)

Speer, Robert Kenneth, Ray Lussenhop, y Ethel L. Smither. Living in Ancient Times. New York ; Richmond [etc.]: Johnson Publishing Co., 1946.

Cita MLA (8a ed.)

Speer, Robert Kenneth, et al. Living in Ancient Times. Johnson Publishing Co., 1946.