APA (7th ed.) Citation

Field, R. (2005). Forts of the American Frontier 1820 - 91: Central and Northern Plains (1. publ.). Osprey.

Chicago Style (17th ed.) Citation

Field, Ron. Forts of the American Frontier 1820 - 91: Central and Northern Plains. 1. publ. Oxford: Osprey, 2005.

MLA (9th ed.) Citation

Field, Ron. Forts of the American Frontier 1820 - 91: Central and Northern Plains. 1. publ. Osprey, 2005.