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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Society (U.S.), Rebecca L. Johnson, और Steven Foster. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. Washington, D.C.: National Geographic, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Geographic Society (U.S.), et al. National Geographic Guide to Medicinal Herbs: The World's Most Effective Healing Plants. National Geographic, 2010.
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