APA (7th ed.) Citation

(2001). National Geographic 112 Years: September 1916 - December 1919 ( Computer disc ). National Geographic Society.

Chicago Style (17th ed.) Citation

National Geographic 112 Years: September 1916 - December 1919 ( Computer Disc ). Washington: National Geographic Society, 2001.

MLA (9th ed.) Citation

National Geographic 112 Years: September 1916 - December 1919 ( Computer Disc ). National Geographic Society, 2001.

Warning: These citations may not always be 100% accurate.