APA (7th ed.) Citation

United States. War Department. (1931). Travel by air, changes in AR 35-1480, 35-2580, 35-3420, 35-4540, and 35-4820. [publisher not identified].

Chicago Style (17th ed.) Citation

United States. War Department. Travel by Air, Changes in AR 35-1480, 35-2580, 35-3420, 35-4540, and 35-4820. Washington: [publisher not identified], 1931.

MLA (9th ed.) Citation

United States. War Department. Travel by Air, Changes in AR 35-1480, 35-2580, 35-3420, 35-4540, and 35-4820. [publisher not identified], 1931.

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