Negi, J. (1998). Travel agency and tour operation: Concepts and principles. Kanishka.
Dyfyniad Arddull ChicagoNegi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. New Delhi: Kanishka, 1998.
Dyfyniad MLANegi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. Kanishka, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.