Citazione Stile APA (7a Edizione)

Ehrlich, P. R., & Ehrlich, A. H. (1981). Extinction: The causes and consequences of the disappearance of species. Random House.

Citazione stile Chigago Style (17a edizione)

Ehrlich, Paul R., e Anne H. Ehrlich. Extinction: The Causes and Consequences of the Disappearance of Species. New York: Random House, 1981.

Citatione MLA (9a ed.)

Ehrlich, Paul R., e Anne H. Ehrlich. Extinction: The Causes and Consequences of the Disappearance of Species. Random House, 1981.