Foster, S., & Johnson, R. L. (2008). National Geographic desk reference to nature's medicine. National Geographic ; Publishers Group UK [distributor].
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रFoster, Steven, और Rebecca L. Johnson. National Geographic Desk Reference to Nature's Medicine. Washington, D.C. : Enfield: National Geographic ; Publishers Group UK [distributor], 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रFoster, Steven, और Rebecca L. Johnson. National Geographic Desk Reference to Nature's Medicine. National Geographic ; Publishers Group UK [distributor], 2008.
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