APA (7th ed.) Citation

Pettingill, O. S. (1951). A guide to bird finding east of the Mississippi. Oxford University Press.

Chicago Style (17th ed.) Citation

Pettingill, Olin Sewall. A Guide to Bird Finding East of the Mississippi. New York: Oxford University Press, 1951.

MLA (9th ed.) Citation

Pettingill, Olin Sewall. A Guide to Bird Finding East of the Mississippi. Oxford University Press, 1951.