Cita APA (7a ed.)

Levin, H. L. (1975). Life through time. W. C. Brown Co..

Cita Chicago Style (17a ed.)

Levin, Harold L. Life Through Time. [Dubuque, Iowa]: W. C. Brown Co., 1975.

Cita MLA (8a ed.)

Levin, Harold L. Life Through Time. W. C. Brown Co., 1975.