APA (7th ed.) Citation

Wilhelm, E. J. (1961). Common birds of Olympic National Park. Olympic Natural History Association in cooperation with the National Park Service.

Chicago Style (17th ed.) Citation

Wilhelm, Eugene J. Common Birds of Olympic National Park. [Washington]: Olympic Natural History Association in cooperation with the National Park Service, 1961.

MLA (9th ed.) Citation

Wilhelm, Eugene J. Common Birds of Olympic National Park. Olympic Natural History Association in cooperation with the National Park Service, 1961.