National Geographic Society (U.S.), National Geographic Channel (Television station : Washington, D.C.), Warner Home Video (Firm), Maltby, C., & Vargas, E. (2008). Human footprint (Widescreen version.). Distributed by Warner Home Video.
Цитирование в стиле Чикаго (17-е изд.)National Geographic Society (U.S.), D.C.) National Geographic Channel (Television station : Washington, Warner Home Video (Firm), Clive Maltby, и Elizabeth Vargas. Human Footprint. Widescreen version. [Burbank, Calif.]: Distributed by Warner Home Video, 2008.
Цитирование MLA (8-е изд.)National Geographic Society (U.S.), et al. Human Footprint. Widescreen version. Distributed by Warner Home Video, 2008.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.