APA (7th ed.) Citation

Bishop & Drury. (1989). Battles of the 20th century. Military Press.

Chicago Style (17th ed.) Citation

Bishop and Drury. Battles of the 20th Century. New York: Military Press, 1989.

MLA (8th ed.) Citation

Bishop and Drury. Battles of the 20th Century. Military Press, 1989.

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