APA (7th ed.) Citation
(1997). <The> world almanac and book of facts 1998. World Almanac Books.
Chicago Style (17th ed.) Citation
<The> World Almanac and Book of Facts 1998. Mahwah: World Almanac Books, 1997.
MLA (9th ed.) Citation
<The> World Almanac and Book of Facts 1998. World Almanac Books, 1997.
Warning: These citations may not always be 100% accurate.