Cita APA (7a ed.)

Gans, C., & Parsons, T. S. (1981). Biology of the reptilia. Academic Press.

Cita Chicago Style (17a ed.)

Gans, Carl, y Thomas S. Parsons. Biology of the Reptilia. London [etc.]: Academic Press, 1981.

Cita MLA (9a ed.)

Gans, Carl, y Thomas S. Parsons. Biology of the Reptilia. Academic Press, 1981.