APA (7 ম সংস্করণ) উদ্ধৃতি

BROWN, L. R. [. a. (1991). State of the world 1991: A worldwatch institute report on progress toward a sustainable society. W.W. Norton and Co.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

BROWN, Lester R. [et al]. State of the World 1991: A Worldwatch Institute Report on Progress Toward a Sustainable Society. New York: W.W. Norton and Co, 1991.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

BROWN, Lester R. [et al]. State of the World 1991: A Worldwatch Institute Report on Progress Toward a Sustainable Society. W.W. Norton and Co, 1991.