Παραπομπή APA

Negi, J. (1998). Travel agency and tour operation: Concepts and principles. Kanishka.

Παραπομπή Chicago Style

Negi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. New Delhi: Kanishka, 1998.

Παραπομπή MLA

Negi, Jagmohan. Travel Agency and Tour Operation: Concepts and Principles. Kanishka, 1998.