APA Edition Citation

Hoffman, M. S. E. (1991). The world almanac and book of facts 1991.

Chicago Edition Citation

Hoffman, Mark S; Ed. The World Almanac and Book of Facts 1991. New York, World Almanac, 1991.

MLA Edition Citation

Hoffman, Mark S; Ed. The World Almanac and Book of Facts 1991. 1991.

Warning: These citations may not always be 100% accurate.