Cita APA

Skutch, A. F., & Gardner, D. (1982). Birds of tropical America. Austin: University of Texas.

Citación estilo Chicago

Skutch, Alexander Frank, y Diana Gardner. Birds of Tropical America. Austin: University of Texas, 1982.

Cita MLA

Skutch, Alexander Frank, y Diana Gardner. Birds of Tropical America. Austin: University of Texas, 1982.