APA (7th ed.) Citation

Heintzelman, D. S. (1978). North American ducks, geese, & swans. Winchester Press.

Chicago Style (17th ed.) Citation

Heintzelman, Donald S. North American Ducks, Geese, & Swans. New York: Winchester Press, 1978.

MLA (9th ed.) Citation

Heintzelman, Donald S. North American Ducks, Geese, & Swans. Winchester Press, 1978.