IE Business Cases. Collision Course: ETS and the Global Airline Industry. [s.n.].
Chicagoスタイル(17版)引用形式IE Business Cases. Collision Course: ETS and the Global Airline Industry. [S.l.]: [s.n.].
MLA(9版)引用形式IE Business Cases. Collision Course: ETS and the Global Airline Industry. [s.n.].
警告: この引用は必ずしも正確ではありません.