APA (7th ed.) Citation

Darlow Smithson Productions, Parallax Film Productions, History Television, National Geographic Channel (Television station : Washington, D.C.), National Geographic Television & Film, Warner Home Video (Firm), . . . Herring, I. (2007). Engineering the impossible (Letterbox version.). National Geographic ; Warner Home Video.

Chicago Style (17th ed.) Citation

Darlow Smithson Productions, et al. Engineering the Impossible. Letterbox version. [Washington, D.C.] : [Burbank, Calif.]: National Geographic ; Warner Home Video, 2007.

MLA (9th ed.) Citation

Darlow Smithson Productions, et al. Engineering the Impossible. Letterbox version. National Geographic ; Warner Home Video, 2007.