United States. Department of Commerce. Aeronautics Branch. (1930). Physical standards for airplane pilots (including standards for lighter-than-air pilots) and appendix of reference text. [publisher not identified].
Chicago Style (17th ed.) CitationUnited States. Department of Commerce. Aeronautics Branch. Physical Standards for Airplane Pilots (including Standards for Lighter-than-air Pilots) and Appendix of Reference Text. [Washington]: [publisher not identified], 1930.
MLA (9th ed.) CitationUnited States. Department of Commerce. Aeronautics Branch. Physical Standards for Airplane Pilots (including Standards for Lighter-than-air Pilots) and Appendix of Reference Text. [publisher not identified], 1930.
Warning: These citations may not always be 100% accurate.