Card, S. F. (1929). Air navigation: Notes and examples. Longmans, Green & Co. ; E. Arnold.
Cita Chicago (17th ed.)Card, Stanton Freeland. Air Navigation: Notes and Examples. New York, : London,: Longmans, Green & Co. ; E. Arnold, 1929.
Cita MLA (8th ed.)Card, Stanton Freeland. Air Navigation: Notes and Examples. Longmans, Green & Co. ; E. Arnold, 1929.
Atenció: Aquestes cites poden no estar 100% correctes.