Παραπομπή APA

(1997). World almanac and book of facts, 1998. World Almanac Books.

Παραπομπή Chicago Style

World Almanac and Book of Facts, 1998. New Jersey: World Almanac Books, 1997.

Παραπομπή MLA

World Almanac and Book of Facts, 1998. World Almanac Books, 1997.