APA (7th ed.) Citation

American Ornithologists' Union. (1957). Check-list of North American birds (5th ed.). [publisher not identified].

Chicago Style (17th ed.) Citation

American Ornithologists' Union. Check-list of North American Birds. 5th ed. [Ithaca, N.Y.]: [publisher not identified], 1957.

MLA (9th ed.) Citation

American Ornithologists' Union. Check-list of North American Birds. 5th ed. [publisher not identified], 1957.