Cita APA (7a ed.)

Collins, J. P., & Crump, M. L. (2009). Extinction in our times: Global amphibian decline. Oxford University Press.

Cita Chicago Style (17a ed.)

Collins, James P., y Martha L. Crump. Extinction in Our Times: Global Amphibian Decline. Oxford ; New York: Oxford University Press, 2009.

Cita MLA (9a ed.)

Collins, James P., y Martha L. Crump. Extinction in Our Times: Global Amphibian Decline. Oxford University Press, 2009.