Cita APA (7a ed.)

Ehrlich, P. R., & Ehrlich, A. H. (1983). Extinction: The causes and consequences of the disappearance of species. Ballantine Books.

Cita Chicago Style (17a ed.)

Ehrlich, Paul R.., y Anne H. Ehrlich. Extinction: The Causes and Consequences of the Disappearance of Species. New York: Ballantine Books, 1983.

Cita MLA (9a ed.)

Ehrlich, Paul R.., y Anne H. Ehrlich. Extinction: The Causes and Consequences of the Disappearance of Species. Ballantine Books, 1983.