Cita APA

Sibley, D. A. 1., & Sibley, D. A. 1. (2014). The Sibley guide to birds (Second edition.). New York: Alfred A. Knopf.

Citación estilo Chicago

Sibley, David Allen 1961-, y David Allen 1961- Sibley. The Sibley Guide to Birds. Second edition. New York: Alfred A. Knopf, 2014.

Cita MLA

Sibley, David Allen 1961-, y David Allen 1961- Sibley. The Sibley Guide to Birds. Second edition. New York: Alfred A. Knopf, 2014.