Sunil Gupta, S. (1998). Tourism towards 21st century (1.). Deep & Deep.
シカゴスタイル引用形Sunil Gupta, S.P. Tourism Towards 21st Century. 1. New Delhi: Deep & Deep, 1998.
MLA引用形式Sunil Gupta, S.P. Tourism Towards 21st Century. 1. Deep & Deep, 1998.
警告: この引用は必ずしも正確ではありません.