Hudman, L. E. (1990). Geography of travel and tourism. Delmar.
Chicagoスタイル(17版)引用形式Hudman, Lloyd E. Geography of Travel and Tourism. Albany, N.Y: Delmar, 1990.
MLA(9版)引用形式Hudman, Lloyd E. Geography of Travel and Tourism. Delmar, 1990.
警告: この引用は必ずしも正確ではありません.