Cita APA

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

Citación estilo Chicago

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

Cita MLA

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