APA (7th ed.) Citation

Longcore, J. R. (2000). American black duck: Anas rubripes. [Birds of North America, Inc.].

Chicago Style (17th ed.) Citation

Longcore, Jerry R. American Black Duck: Anas Rubripes. [Philadelphia, Pa.]: [Birds of North America, Inc.], 2000.

MLA (9th ed.) Citation

Longcore, Jerry R. American Black Duck: Anas Rubripes. [Birds of North America, Inc.], 2000.