Cita APA

Stiles Hurd, F. G. 1., Skutch, A. F. 1., & Gardner, D. G. 1. (1989). A Guide to the birds of Costa Rica. Ithaca, N.Y.: Cornell University Press.

Citación estilo Chicago

Stiles Hurd, Frank Garfield 1942-, Alexander Frank 1904-2004 Skutch, y Dana Gordon 1950- Gardner. A Guide to the Birds of Costa Rica. Ithaca, N.Y.: Cornell University Press, 1989.

Cita MLA

Stiles Hurd, Frank Garfield 1942-, Alexander Frank 1904-2004 Skutch, y Dana Gordon 1950- Gardner. A Guide to the Birds of Costa Rica. Ithaca, N.Y.: Cornell University Press, 1989.