Hoff and Overgaard & World Tourism Organization. (1992). Tourism master plan for the Philippines. World Tourism Organization.
Chicagoスタイル(17版)引用形式Hoff and Overgaard , World Tourism Organization. Tourism Master Plan for the Philippines. [Madridn]: World Tourism Organization, 1992.
MLA(9版)引用形式Hoff and Overgaard , World Tourism Organization. Tourism Master Plan for the Philippines. World Tourism Organization, 1992.
警告: この引用は必ずしも正確ではありません.