APA (7th ed.) Citation

Chappell, M., & Johnson, L. (1994). Scottish units in the World Wars. Osprey.

Chicago Style (17th ed.) Citation

Chappell, Mike, and Lee Johnson. Scottish Units in the World Wars. London: Osprey, 1994.

MLA (9th ed.) Citation

Chappell, Mike, and Lee Johnson. Scottish Units in the World Wars. Osprey, 1994.