Mill, R. C. (1990). Tourism: The international business. Prentice-Hall.
Chicagoスタイル(17版)引用形式Mill, Robert Christie. Tourism: The International Business. Englewood Cliffs, N.J: Prentice-Hall, 1990.
MLA(9版)引用形式Mill, Robert Christie. Tourism: The International Business. Prentice-Hall, 1990.
警告: この引用は必ずしも正確ではありません.