Kaufman, K., Bowers, R., Bowers, N., & Hassler, L. (2005). Kaufman field guide to birds of North America. Houghton Mifflin.
Cita Chicago Style (17a ed.)Kaufman, Kenn, Rick Bowers, Nora Bowers, y Lynn Hassler. Kaufman Field Guide to Birds of North America. New York: Houghton Mifflin, 2005.
Cita MLA (8a ed.)Kaufman, Kenn, et al. Kaufman Field Guide to Birds of North America. Houghton Mifflin, 2005.
Precaución: Estas citas no son 100% exactas.