Não informado. (1969). Airline management and marketing including american aviation. Ziff-Davis Aviation Division.
Chicago-Zitierstil (17. Ausg.)Não informado. Airline Management and Marketing Including American Aviation. Washington: Ziff-Davis Aviation Division, 1969.
MLA-Zitierstil (8. Ausg.)Não informado. Airline Management and Marketing Including American Aviation. Ziff-Davis Aviation Division, 1969.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.