Record Citations
APA (7th ed.) Citation
National Geographic Book Service. (1987). Into the unknown: The story of exploration. National Geographic Society.
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Chicago Style (17th ed.) Citation
National Geographic Book Service. Into the Unknown: The Story of Exploration. Washington, D.C.: National Geographic Society, 1987.
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MLA (9th ed.) Citation
National Geographic Book Service. Into the Unknown: The Story of Exploration. National Geographic Society, 1987.
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Warning: These citations may not always be 100% accurate.
