National Geographic Society (U.S.) & Johns, C. (2014). Women of vision: National Geographic Photographers on Assignment. National Geographic Society.
Chicago-referens (17:e uppl.)National Geographic Society (U.S.) och Chris Johns. Women of Vision: National Geographic Photographers on Assignment. Washington, District of Columbia: National Geographic Society, 2014.
MLA-referens (8:e uppl.)National Geographic Society (U.S.) och Chris Johns. Women of Vision: National Geographic Photographers on Assignment. National Geographic Society, 2014.
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