National Geographic Society (Spojené státy americké). National Geographic Maps & Carroll, A. (2003). 100 years of flight. National Geographic Society.
Citace podle Chicago (17th ed.)National Geographic Society (Spojené státy americké). National Geographic Maps a Allen Carroll. 100 Years of Flight. Washington: National Geographic Society, 2003.
Citace podle MLA (9th ed.)National Geographic Society (Spojené státy americké). National Geographic Maps a Allen Carroll. 100 Years of Flight. National Geographic Society, 2003.
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