APA (7 ম সংস্করণ) উদ্ধৃতি

Bryan, C. D. B. (1987). The National Geographic Society: 100 years of adventure and discovery. Harry N. Abrams.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Bryan, C. D. B. The National Geographic Society: 100 Years of Adventure and Discovery. New York: Harry N. Abrams, 1987.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Bryan, C. D. B. The National Geographic Society: 100 Years of Adventure and Discovery. Harry N. Abrams, 1987.