{"source":"website","style":"apa","website": {"title":"National geographic" },"contributors": [{"function":"author","last":"National Geographic Society (U.S.),"} ],"pubtype": {"main": "pubonline"},"pubonline": {"title":"National geographic","url":"https://search.proquest.com/publication/48064"},"datasource":"/z-wcorg/","datasource":"http://www.worldcat.org","oclc":"1252723560","issn":"1931-1524"}