(2002). General guidelines for using data on international air-passenger traffic for tourism analysis. Madrid: World Tourism Organization.
استشهاد بنمط شيكاغوGeneral Guidelines for Using Data On International Air-passenger Traffic for Tourism Analysis. Madrid: World Tourism Organization, 2002.
MLA استشهادGeneral Guidelines for Using Data On International Air-passenger Traffic for Tourism Analysis. Madrid: World Tourism Organization, 2002.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.