History Channel (Television network), New Video Group, Cohen, D., & Thompson, E. (2007). The universe: Explore the edges of the unknown. A & E Television Networks : Distributed by New Video.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHistory Channel (Television network), New Video Group, Douglas Cohen, और Erik Thompson. The Universe: Explore the Edges of the Unknown. [New York, N.Y.]: A & E Television Networks : Distributed by New Video, 2007.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHistory Channel (Television network), et al. The Universe: Explore the Edges of the Unknown. A & E Television Networks : Distributed by New Video, 2007.
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