Cita APA

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

Chicago Edition Citation

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

Cita MLA

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

Atenció: Aquestes cites poden no estar 100% correctes.