Hudman, L. E., & Jackson, R. H. Geography of travel and tourism (2nd ed.). Columbia: Delmar Publishers.
استشهاد بنمط شيكاغوHudman, Lloyd E., and Richard H. Jackson. Geography of Travel and Tourism. 2nd ed. Columbia: Delmar Publishers.
MLA استشهادHudman, Lloyd E., and Richard H. Jackson. Geography of Travel and Tourism. 2nd ed. Columbia: Delmar Publishers.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.