APA Citatie

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

Chicago Style citaat

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

MLA citatie

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

Let op: Deze citaties zijn niet altijd 100% accuraat.