Ashim Gupta. (2012). Travel agency and tour operations: Concepts and principles. Centrum Press.
シカゴスタイル引用形Ashim Gupta. Travel Agency and Tour Operations: Concepts and Principles. New Delhi: Centrum Press, 2012.
MLA引用形式Ashim Gupta. Travel Agency and Tour Operations: Concepts and Principles. Centrum Press, 2012.
警告: この引用は必ずしも正確ではありません.