APA (7th ed.) Citation

Pierotti, R. J., & Annett, C. A. (1995). Western gull: Larus occidentalis. American Ornithologists' Union ; The Academy of Natural Sciences.

Chicago Style (17th ed.) Citation

Pierotti, Raymond John, and Cynthia Ann Annett. Western Gull: Larus Occidentalis. Washington, D.C. : Philadelphia, PA: American Ornithologists' Union ; The Academy of Natural Sciences, 1995.

MLA (9th ed.) Citation

Pierotti, Raymond John, and Cynthia Ann Annett. Western Gull: Larus Occidentalis. American Ornithologists' Union ; The Academy of Natural Sciences, 1995.