APA (7th ed.) Citation

Heintzelman, D. S. (1976). A guide to eastern hawk watching. Pennsylvania State University Press.

Chicago Style (17th ed.) Citation

Heintzelman, Donald S. A Guide to Eastern Hawk Watching. University Park: Pennsylvania State University Press, 1976.

MLA (9th ed.) Citation

Heintzelman, Donald S. A Guide to Eastern Hawk Watching. Pennsylvania State University Press, 1976.

Warning: These citations may not always be 100% accurate.