APA (7th ed.) Citation

(1991). The World alamanac and book of facts. Pharos Books.

Chicago Style (17th ed.) Citation

The World Alamanac and Book of Facts. New York: Pharos Books, 1991.

MLA (9th ed.) Citation

The World Alamanac and Book of Facts. Pharos Books, 1991.

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