APA引文

Alderfer, J. K., & Hess, P. (2011). National Geographic backyard guide to the birds of North America. National Geographic.

Chicago Style (17th ed.) Citation

Alderfer, Jonathan K., and Paul Hess. National Geographic Backyard Guide to the Birds of North America. Washington, D.C.: National Geographic, 2011.

MLA引文

Alderfer, Jonathan K., and Paul Hess. National Geographic Backyard Guide to the Birds of North America. National Geographic, 2011.

警告：這些引文格式不一定是100％准確.