Cita APA (7a ed.)

Morowitz, H. J., & Morowitz, L. S. (1974). Life on the planet earth. Norton.

Cita Chicago Style (17a ed.)

Morowitz, Harold J., y Lucille S. Morowitz. Life on the Planet Earth. New York: Norton, 1974.

Cita MLA (8a ed.)

Morowitz, Harold J., y Lucille S. Morowitz. Life on the Planet Earth. Norton, 1974.