Cita APA (7a ed.)
National Geographic Television & Film, Warner Home Video (Firma), & Donnelly, N. (2006). Is it real?: Ancient astronauts. National Geographic ; distributed by Warner Home Video.
Cita Chicago Style (17a ed.)
National Geographic Television & Film, Warner Home Video (Firma), y Nancy Donnelly. Is It Real?: Ancient Astronauts. [Washington, D.C.?] : Burbank, CA: National Geographic ; distributed by Warner Home Video, 2006.
Cita MLA (9a ed.)
National Geographic Television & Film, et al. Is It Real?: Ancient Astronauts. National Geographic ; distributed by Warner Home Video, 2006.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.