Royal Geographical Society (Great Britain), Cater, E., & Lowman, G. (1994). Ecotourism: A sustainable option? Wiley.
Chicagoスタイル(17版)引用形式Royal Geographical Society (Great Britain), Erlet Cater, , Gwen Lowman. Ecotourism: A Sustainable Option? Chichester ; New York: Wiley, 1994.
MLA(8版)引用形式Royal Geographical Society (Great Britain), et al. Ecotourism: A Sustainable Option? Wiley, 1994.
警告: この引用は必ずしも正確ではありません.