Bedell, F. (1920). The airplane: A practical discussion of the principles of airplane flight. D. Van Nostrand Co..
Lua i Stíl Chicago (17ú heag.)Bedell, Frederick. The Airplane: A Practical Discussion of the Principles of Airplane Flight. New York: D. Van Nostrand Co., 1920.
Lua MLA (8ú heag.)Bedell, Frederick. The Airplane: A Practical Discussion of the Principles of Airplane Flight. D. Van Nostrand Co., 1920.
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