National Geographic Channel (Television station : Washington, D.C.), BBC Worldwide Americas, Inc, & Stewart, I. S. (2008). Earth: The biography. Distributed by BBC Worldwide Americas ; Distributed by Warner Home Video.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNational Geographic Channel (Television station : Washington, D.C.), Inc BBC Worldwide Americas, और Iain S. Stewart. Earth: The Biography. [New York, NY] : Burbank, CA: Distributed by BBC Worldwide Americas ; Distributed by Warner Home Video, 2008.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNational Geographic Channel (Television station : Washington, D.C.), et al. Earth: The Biography. Distributed by BBC Worldwide Americas ; Distributed by Warner Home Video, 2008.
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