APA (7th ed.) Citation

United States. War Department. (1939). Technical Regulations: Fire Control and Sighting Materiel for Antiaircraft Artillery; Antiaircraft Battery Commander`s Observation Instrument, M1; prepared under direction of chief of ordnance. [s.n.].

Chicago Style (17th ed.) Citation

United States. War Department. Technical Regulations: Fire Control and Sighting Materiel for Antiaircraft Artillery; Antiaircraft Battery Commander`s Observation Instrument, M1; Prepared Under Direction of Chief of Ordnance. [Washington]: [s.n.], 1939.

MLA (9th ed.) Citation

United States. War Department. Technical Regulations: Fire Control and Sighting Materiel for Antiaircraft Artillery; Antiaircraft Battery Commander`s Observation Instrument, M1; Prepared Under Direction of Chief of Ordnance. [s.n.], 1939.