APA
(2001). THE WORLD ALMANAC AND BOOK OF FACTS 2001. New Jersey: World Almanac Books.
Chicago
2001. THE WORLD ALMANAC AND BOOK OF FACTS 2001. New Jersey: World Almanac Books.
Harvard
(2001). THE WORLD ALMANAC AND BOOK OF FACTS 2001. New Jersey: World Almanac Books.
MLA
THE WORLD ALMANAC AND BOOK OF FACTS 2001. New Jersey: World Almanac Books. 2001.