National Geographic Television & Film, National Geographic Channel (Television station : Washington, D.C.), Dockstader, N., & Diamond, J. M. (2010). Collapse. National Geographic Channel ; Distributed by Vivendi Entertainment.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Television & Film, D.C.) National Geographic Channel (Television station : Washington, Noel Dockstader, और Jared M. Diamond. Collapse. [Washington, D.C.?] : Universal City, Calif.: National Geographic Channel ; Distributed by Vivendi Entertainment, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Geographic Television & Film, et al. Collapse. National Geographic Channel ; Distributed by Vivendi Entertainment, 2010.
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