Cita APA

Steven, H., & Hilty, S. (1994). Birds of tropical America: A watcher's introduction to behavior, breeding and diversity. Canada: Steven Hilty.

Citación estilo Chicago

Steven, Hilty, y Steven Hilty. Birds of Tropical America: A Watcher's Introduction to Behavior, Breeding and Diversity. Canada: Steven Hilty, 1994.

Cita MLA

Steven, Hilty, y Steven Hilty. Birds of Tropical America: A Watcher's Introduction to Behavior, Breeding and Diversity. Canada: Steven Hilty, 1994.