APA (7th ed.) Citation
(1998). <The> World almanac and book of facts 1999. World Almanac Books.
Chicago Style (17th ed.) Citation
<The> World Almanac and Book of Facts 1999. Mahwah: World Almanac Books, 1998.
MLA (9th ed.) Citation
<The> World Almanac and Book of Facts 1999. World Almanac Books, 1998.
Warning: These citations may not always be 100% accurate.