APA (7th ed.) Citation

United States. Adjutant-General's Office. (1938). Army extension courses: Bombardment aviation. [s.n.].

Chicago Style (17th ed.) Citation

United States. Adjutant-General's Office. Army Extension Courses: Bombardment Aviation. [Washington]: [s.n.], 1938.

MLA (9th ed.) Citation

United States. Adjutant-General's Office. Army Extension Courses: Bombardment Aviation. [s.n.], 1938.