United States. War Department. (1931). Army extension courses: Extension course of Field Artillery School, subcourse 40-5, tactical employment of field artillery, general, 1931-32. GPO.
Chicago Style (17th ed.) CitationUnited States. War Department. Army Extension Courses: Extension Course of Field Artillery School, Subcourse 40-5, Tactical Employment of Field Artillery, General, 1931-32. [Washington]: GPO, 1931.
MLA (9th ed.) CitationUnited States. War Department. Army Extension Courses: Extension Course of Field Artillery School, Subcourse 40-5, Tactical Employment of Field Artillery, General, 1931-32. GPO, 1931.
Warning: These citations may not always be 100% accurate.