APA-ийн эшлэл(7 дахь хэвлэлт)

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.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

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.

MLA -ийн эшлэл (9 дэх хэвлэлт)

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.