(1990). Discover America package tour handbook: A basic guide for the development and marketing of pre-planned domestic packaged travel. Travel Industry Association of America.
Chicagoスタイル(17版)引用形式Discover America Package Tour Handbook: A Basic Guide for the Development and Marketing of Pre-planned Domestic Packaged Travel. Washington, D.C: Travel Industry Association of America, 1990.
MLA(9版)引用形式Discover America Package Tour Handbook: A Basic Guide for the Development and Marketing of Pre-planned Domestic Packaged Travel. Travel Industry Association of America, 1990.
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