APA (7th ed.) Citation

Gerlach, J., & Gerlach, B. (2013). Digital wildlife photography. Focal Press.

Chicago Style (17th ed.) Citation

Gerlach, John, and Barbara Gerlach. Digital Wildlife Photography. New York ; London: Focal Press, 2013.

MLA (9th ed.) Citation

Gerlach, John, and Barbara Gerlach. Digital Wildlife Photography. Focal Press, 2013.