APA (7th ed.) Citation

Gibbs, J. P., Reid, F. A., & Melvin, S. M. (1992). Least bittern: Ixobrychus exilis. American Ornithologists' Union ; The Academy of Natural Sciences.

Chicago Style (17th ed.) Citation

Gibbs, James P., F. A. Reid, and Scott M. Melvin. Least Bittern: Ixobrychus Exilis. Washington, D.C. : Philadelphia, PA: American Ornithologists' Union ; The Academy of Natural Sciences, 1992.

MLA (9th ed.) Citation

Gibbs, James P., et al. Least Bittern: Ixobrychus Exilis. American Ornithologists' Union ; The Academy of Natural Sciences, 1992.