APA (7th ed.) Citation

Field, R. (2011). Forts of the American Frontier: 1776 - 1891 ; California, Oregon, Washington, and Alaska (1. publ.). Osprey.

Chicago Style (17th ed.) Citation

Field, Ron. Forts of the American Frontier: 1776 - 1891 ; California, Oregon, Washington, and Alaska. 1. publ. Oxford: Osprey, 2011.

MLA (9th ed.) Citation

Field, Ron. Forts of the American Frontier: 1776 - 1891 ; California, Oregon, Washington, and Alaska. 1. publ. Osprey, 2011.