एपीए उद्धरण

(1991). The Facts on File encyclopedia of the 20th century. New York: Facts on File.

शिकागो स्टाइल उद्धरण

The Facts On File Encyclopedia of the 20th Century. New York: Facts on File, 1991.

एमएलए उद्धरण

The Facts On File Encyclopedia of the 20th Century. New York: Facts on File, 1991.