Cita APA

(1971). The World almanac and book of facts: 1972 edition. Newspaper Enterprise Association.

Citación estilo Chicago

The World Almanac and Book of Facts: 1972 Edition. New York: Newspaper Enterprise Association, 1971.

Cita MLA

The World Almanac and Book of Facts: 1972 Edition. New York: Newspaper Enterprise Association, 1971.

Precaución: Estas citas no son 100% exactas.