Heintzelman, D. S. (1978). North American ducks, geese, & swans. Winchester Press.
Chicago Style (17th ed.) CitationHeintzelman, Donald S. North American Ducks, Geese, & Swans. New York: Winchester Press, 1978.
MLA (9th ed.) CitationHeintzelman, Donald S. North American Ducks, Geese, & Swans. Winchester Press, 1978.
Warning: These citations may not always be 100% accurate.