APA (7th ed.) Citation

(1934). Memorandum for aviators, July 14, 1934. [s.n.].

Chicago Style (17th ed.) Citation

Memorandum for Aviators, July 14, 1934. [Washington]: [s.n.], 1934.

MLA (9th ed.) Citation

Memorandum for Aviators, July 14, 1934. [s.n.], 1934.

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