Oppel, F. (1987). Early flight: From balloons to biplanes. Castle.
Chicago Style (17th ed.) CitationOppel, Frank. Early Flight: From Balloons to Biplanes. Seacaucus, N.J.: Castle, 1987.
MLA (9th ed.) CitationOppel, Frank. Early Flight: From Balloons to Biplanes. Castle, 1987.
Warning: These citations may not always be 100% accurate.