Cita APA

Saunders, G. B., & Chapman Saunders, D. (1981). Waterfowl and their wintering ground in Mexico 1937-64. Washington: Fish and Wildlife Service.

Citación estilo Chicago

Saunders, George B., y Dorothy Chapman Saunders. Waterfowl and Their Wintering Ground in Mexico 1937-64. Washington: Fish and Wildlife Service, 1981.

Cita MLA

Saunders, George B., y Dorothy Chapman Saunders. Waterfowl and Their Wintering Ground in Mexico 1937-64. Washington: Fish and Wildlife Service, 1981.