National Geographic Society (Washington, D.C.), WQED (Television station : Pittsburg, Pa.), Cobbler, J., Joubert, B., & Joubert, D. (1990). Journey to the forgotten river [videorecording]. The Society.
Citace podle Chicago (17th ed.)National Geographic Society (Washington, D.C.), Pa.) WQED (Television station : Pittsburg, Jonathan Cobbler, Beverly Joubert, a Dereck Joubert. Journey to the Forgotten River [videorecording]. Washington, D.C: The Society, 1990.
Citace podle MLA (9th ed.)National Geographic Society (Washington, D.C.), et al. Journey to the Forgotten River [videorecording]. The Society, 1990.
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