American Ornithologists' Union, Academy of Natural Sciences of Philadelphia, & Koenig, W. D. (1995). Acorn woodpecker: Melanerpes formicivorus. American Ornithologists' Union ; The Academy of Natural Sciences.
Chicago Style (17th ed.) CitationAmerican Ornithologists' Union, Academy of Natural Sciences of Philadelphia, and Walter D. Koenig. Acorn Woodpecker: Melanerpes Formicivorus. Washington, D.C. : Philadelphia, PA: American Ornithologists' Union ; The Academy of Natural Sciences, 1995.
MLA (9th ed.) CitationAmerican Ornithologists' Union, et al. Acorn Woodpecker: Melanerpes Formicivorus. American Ornithologists' Union ; The Academy of Natural Sciences, 1995.
Warning: These citations may not always be 100% accurate.