APA (7th ed.) Citation

Williamson, G., & Volstad, R. (1989). German military police units, 1939-45. Osprey Pub..

Chicago Style (17th ed.) Citation

Williamson, Gordon, and Ron Volstad. German Military Police Units, 1939-45. London: Osprey Pub., 1989.

MLA (9th ed.) Citation

Williamson, Gordon, and Ron Volstad. German Military Police Units, 1939-45. Osprey Pub., 1989.

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