APA引文

Howell, C. H. (2016). National Geographic pocket guide to the mammals of North America. National Geographic.

Chicago Style (17th ed.) Citation

Howell, Catherine Herbert. National Geographic Pocket Guide to the Mammals of North America. Washington, D. C.: National Geographic, 2016.

MLA引文

Howell, Catherine Herbert. National Geographic Pocket Guide to the Mammals of North America. National Geographic, 2016.

警告：這些引文格式不一定是100％准確.