APA (7th ed.) Citation

United States. War Department. (1939). Technical Regulation, No. 1320-39: Weapons: Browning Tank Machine Gun, Caliber .30, Model of 1919. Changes 4. [s.n.].

Chicago Style (17th ed.) Citation

United States. War Department. Technical Regulation, No. 1320-39: Weapons: Browning Tank Machine Gun, Caliber .30, Model of 1919. Changes 4. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. War Department. Technical Regulation, No. 1320-39: Weapons: Browning Tank Machine Gun, Caliber .30, Model of 1919. Changes 4. [s.n.], 1939.