Dunn, J. L., & Alderfer, J. (2006). National Geographic field guide to the birds of North America (5. ed.). Washington, D.C.: National Geographic.
Chicago Style CitationDunn, Jon L., and Jonathan Alderfer. National Geographic Field Guide to the Birds of North America. 5. ed. Washington, D.C.: National Geographic, 2006.
MLA CitationDunn, Jon L., and Jonathan Alderfer. National Geographic Field Guide to the Birds of North America. 5. ed. Washington, D.C.: National Geographic, 2006.
Warning: These citations may not always be 100% accurate.