Cita APA (7a ed.)

Preston, H. A. (1970). A history of the Walla Walla District. U.S. Army, Corps of Engineers.

Cita Chicago Style (17a ed.)

Preston, Howard A. A History of the Walla Walla District. Walla Walla, Wash.: U.S. Army, Corps of Engineers, 1970.

Cita MLA (8a ed.)

Preston, Howard A. A History of the Walla Walla District. U.S. Army, Corps of Engineers, 1970.

Precaución: Estas citas no son 100% exactas.