Cita APA (7th ed.)
National Audubon Society, BirdLife International, Frances, P., & Burnie, D. (2007). Bird: The definitive visual guide (1st American ed.). DK Pub..
Cita Chicago (17th ed.)
National Audubon Society, BirdLife International, Peter Frances, i David Burnie. Bird: The Definitive Visual Guide. 1st American ed. New York: DK Pub., 2007.
Cita MLA (9th ed.)
National Audubon Society, et al. Bird: The Definitive Visual Guide. 1st American ed. DK Pub., 2007.
Atenció: Aquestes cites poden no estar 100% correctes.