APA (7th ed.) Citation

United States. War Department. (1931). Army extension courses: Extension course of Field Artillery School, subcourse 40-8, corps and army artillery, 1931-32. GPO.

Chicago Style (17th ed.) Citation

United States. War Department. Army Extension Courses: Extension Course of Field Artillery School, Subcourse 40-8, Corps and Army Artillery, 1931-32. [Washington]: GPO, 1931.

MLA (9th ed.) Citation

United States. War Department. Army Extension Courses: Extension Course of Field Artillery School, Subcourse 40-8, Corps and Army Artillery, 1931-32. GPO, 1931.