APA引文

National Geographic Society (U.S.), Johnson, R. L., & Foster, S. (2010). National Geographic guide to medicinal herbs: The world's most effective healing plants. National Geographic.

Chicago Style (17th ed.) Citation

National Geographic Society (U.S.), Rebecca L. Johnson, and Steven Foster. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. Washington, D.C.: National Geographic, 2010.

MLA引文

National Geographic Society (U.S.), et al. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. National Geographic, 2010.

警告：這些引文格式不一定是100％准確.