APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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