APA (7th ed.) Citation

(1931). Headquarters and headquarters battery, 155-mm. howitzer battalion, tractor-drawn; effective July 1, 1931. GPO.

Chicago Style (17th ed.) Citation

Headquarters and Headquarters Battery, 155-mm. Howitzer Battalion, Tractor-drawn; Effective July 1, 1931. [Washington]: GPO, 1931.

MLA (9th ed.) Citation

Headquarters and Headquarters Battery, 155-mm. Howitzer Battalion, Tractor-drawn; Effective July 1, 1931. GPO, 1931.

Warning: These citations may not always be 100% accurate.