APA引文

Dunn, J. L., & Alderfer, J. K. (2008). National Geographic field guide to the birds of western North America. National Geographic.

Chicago Style (17th ed.) Citation

Dunn, Jon L., and Jonathan K. Alderfer. National Geographic Field Guide to the Birds of Western North America. Washington, D.C.: National Geographic, 2008.

MLA引文

Dunn, Jon L., and Jonathan K. Alderfer. National Geographic Field Guide to the Birds of Western North America. National Geographic, 2008.

警告：這些引文格式不一定是100％准確.