APA (7th ed.) Citation

United States. War Department. (1939). Technical Regulation, No. 50-1300A: Infantry and Aircraft Armament, Browning Machine Gun, Caliber .50, M1921, Water-Cooled, Changes 3. [s.n.].

Chicago Style (17th ed.) Citation

United States. War Department. Technical Regulation, No. 50-1300A: Infantry and Aircraft Armament, Browning Machine Gun, Caliber .50, M1921, Water-Cooled, Changes 3. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. War Department. Technical Regulation, No. 50-1300A: Infantry and Aircraft Armament, Browning Machine Gun, Caliber .50, M1921, Water-Cooled, Changes 3. [s.n.], 1939.