Royal Geographical Society (Great Britain), Cater, E., & Lowman, G. (1994). Ecotourism: A sustainable option? Wiley.
芝加哥风格引文Royal Geographical Society (Great Britain), Erlet Cater, 与 Gwen Lowman. Ecotourism: A Sustainable Option? Chichester ; New York: Wiley, 1994.
MLA引文Royal Geographical Society (Great Britain), et al. Ecotourism: A Sustainable Option? Wiley, 1994.
警告：这些引文格式不一定是100％准确.