APA (7th ed.) Citation

United States. Army. Air Corps. (1931). Training: Ratings and requirements for attainment thereof. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. Army. Air Corps. Training: Ratings and Requirements for Attainment Thereof. Washington: [publisher not identified], 1931.

MLA (9th ed.) Citation

United States. Army. Air Corps. Training: Ratings and Requirements for Attainment Thereof. [publisher not identified], 1931.

Warning: These citations may not always be 100% accurate.