APA (7th ed.) Citation

United States. Army. Air Corps. (1920). Aerial bombardment manual for use in Air Service Bombardment School: Part 2. Rules and regulations. GPO.

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Aerial Bombardment Manual for Use in Air Service Bombardment School: Part 2. Rules and Regulations. [Washington]: GPO, 1920.

MLA (9th ed.) Citation

United States. Army. Air Corps. Aerial Bombardment Manual for Use in Air Service Bombardment School: Part 2. Rules and Regulations. GPO, 1920.