Singh, R. (2003). National ecotourism and wildlife tourism: Policies and guidelines. Kanishka.
シカゴスタイル引用形Singh, Ratandeep. National Ecotourism and Wildlife Tourism: Policies and Guidelines. New Delhi: Kanishka, 2003.
MLA引用形式Singh, Ratandeep. National Ecotourism and Wildlife Tourism: Policies and Guidelines. Kanishka, 2003.
警告: この引用は必ずしも正確ではありません.