APA (7th ed.) Citation

(1931). School supplement of air commerce regulations; effective as amended Jan. 1, 1931. GPO.

Chicago Style (17th ed.) Citation

School Supplement of Air Commerce Regulations; Effective as Amended Jan. 1, 1931. [Washington]: GPO, 1931.

MLA (9th ed.) Citation

School Supplement of Air Commerce Regulations; Effective as Amended Jan. 1, 1931. GPO, 1931.

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