APA (7th ed.) Citation

Keegan, J. (1983). World armies (2. ed.). Gale Research.

Chicago Style (17th ed.) Citation

Keegan, John. World Armies. 2. ed. Detroit, Mich: Gale Research, 1983.

MLA (9th ed.) Citation

Keegan, John. World Armies. 2. ed. Gale Research, 1983.