National Geographic Television, National Geographic Society (U.S.), Public Broadcasting Service (U.S.), Clark, L., & Effros, J. (2009). Secrets of Shangri-La: Quest for sacred caves. NGHT.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Television, National Geographic Society (U.S.), Public Broadcasting Service (U.S.), Liesl Clark, और Jamie Effros. Secrets of Shangri-La: Quest for Sacred Caves. Washington, D.C.: NGHT, 2009.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Geographic Television, et al. Secrets of Shangri-La: Quest for Sacred Caves. NGHT, 2009.
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