APA (7th ed.) Citation

Greentree, D., & Campbell, D. F. J. (2012). Napoleon's Swiss Troops. Osprey.

Chicago Style (17th ed.) Citation

Greentree, David, and David F. J. Campbell. Napoleon's Swiss Troops. Oxford: Osprey, 2012.

MLA (9th ed.) Citation

Greentree, David, and David F. J. Campbell. Napoleon's Swiss Troops. Osprey, 2012.