Flight 33 Productions (Firm), History Channel (Television network), Arts and Entertainment Network, Cohen, D. J., & Thompson, E. (2008). The universe: Biggest things in space, gravity, cosmic apocalypse, backyard astronomers. A&E Television Networks : Distributed by New Video.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Flight 33 Productions (Firm), History Channel (Television network), Arts and Entertainment Network, Douglas J. Cohen, و Erik Thompson. The Universe: Biggest Things in Space, Gravity, Cosmic Apocalypse, Backyard Astronomers. [New York, NY]: A&E Television Networks : Distributed by New Video, 2008.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Flight 33 Productions (Firm), et al. The Universe: Biggest Things in Space, Gravity, Cosmic Apocalypse, Backyard Astronomers. A&E Television Networks : Distributed by New Video, 2008.