APA
National geographic May _Aug 2006, . (2006). National geographic May _Aug 2006. USA: National Geographical Society of India.
Chicago
National geographic May _Aug 2006, . 2006. National geographic May _Aug 2006. USA: National Geographical Society of India.
Harvard
National geographic May _Aug 2006, . (2006). National geographic May _Aug 2006. USA: National Geographical Society of India.
MLA
National geographic May _Aug 2006, . National geographic May _Aug 2006. USA: National Geographical Society of India. 2006.