APA
National Geographic Society, . (2001). The Complete National Geographic Year in Review 2000 [electronic resource]. Washington, D.C: National Geographic Society.
Chicago
National Geographic Society, . 2001. The Complete National Geographic Year in Review 2000 [electronic resource]. Washington, D.C: National Geographic Society.
Harvard
National Geographic Society, . (2001). The Complete National Geographic Year in Review 2000 [electronic resource]. Washington, D.C: National Geographic Society.
MLA
National Geographic Society, . The Complete National Geographic Year in Review 2000 [electronic resource]. Washington, D.C: National Geographic Society. 2001.
