APA (7th ed.) Citation

(1980). The world almanac & book of facts 1981. Newspaper Enterprise Association, Inc.

Chicago Style (17th ed.) Citation

The World Almanac & Book of Facts 1981. New York: Newspaper Enterprise Association, Inc, 1980.

MLA (9th ed.) Citation

The World Almanac & Book of Facts 1981. Newspaper Enterprise Association, Inc, 1980.

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