APA (7th ed.) Citation

Butterfield & Bowman. (1986). The World almanac of the Vietnam War. World Almanac.

Chicago Style (17th ed.) Citation

Butterfield and Bowman. The World Almanac of the Vietnam War. New York: World Almanac, 1986.

MLA (8th ed.) Citation

Butterfield and Bowman. The World Almanac of the Vietnam War. World Almanac, 1986.

Warning: These citations may not always be 100% accurate.