Cita APA

McDonald, M. E. (1981). Key to trematodes reported in waterfowl. Washington, D. C.: Fish and Wildlife Service.

Citación estilo Chicago

McDonald, Malcolm E. Key to Trematodes Reported in Waterfowl. Washington, D. C.: Fish and Wildlife Service, 1981.

Cita MLA

McDonald, Malcolm E. Key to Trematodes Reported in Waterfowl. Washington, D. C.: Fish and Wildlife Service, 1981.