APA (7th ed.) Citation

Pettingill, O. S. (1965). The bird watcher's America ([1st ed.].). McGraw-Hill.

Chicago Style (17th ed.) Citation

Pettingill, Olin Sewall. The Bird Watcher's America. [1st ed.]. New York: McGraw-Hill, 1965.

MLA (9th ed.) Citation

Pettingill, Olin Sewall. The Bird Watcher's America. [1st ed.]. McGraw-Hill, 1965.