Quesada, F. B. (1976). The mechanics and economics of tourism. s.n.].
Chicagoスタイル(17版)引用形式Quesada, Francisco B. The Mechanics and Economics of Tourism. [S.l: s.n.], 1976.
MLA(9版)引用形式Quesada, Francisco B. The Mechanics and Economics of Tourism. s.n.], 1976.
警告: この引用は必ずしも正確ではありません.