APA (7th ed.) Citation

United States. Army. Air Corps. (1931). Handbook of instructions for assembly and maintenance, with parts catalog, of Keystone bombardment airplanes, Air Corps type B-4A and B-6A, manufactured for U.S. Army Air Corps on contract W535-AC-4067. Keystone Aircraft Corporation.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Handbook of Instructions for Assembly and Maintenance, with Parts Catalog, of Keystone Bombardment Airplanes, Air Corps Type B-4A and B-6A, Manufactured for U.S. Army Air Corps on Contract W535-AC-4067. [United States]: Keystone Aircraft Corporation, 1931.

MLA (9th ed.) Citation

United States. Army. Air Corps. Handbook of Instructions for Assembly and Maintenance, with Parts Catalog, of Keystone Bombardment Airplanes, Air Corps Type B-4A and B-6A, Manufactured for U.S. Army Air Corps on Contract W535-AC-4067. Keystone Aircraft Corporation, 1931.