Negi, J. (1998). Travel agency and tour operation: Concepts and principles. Kanishka.
シカゴスタイル引用形Negi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. New Delhi: Kanishka, 1998.
MLA引用形式Negi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. Kanishka, 1998.
警告: この引用は必ずしも正確ではありません.