Παραπομπή APA

Negi, J. (2006). Travel agency and tour operations: Concepts and principles (2 edition.).

Παραπομπή Chicago Style

Negi, Jagmohan. Travel Agency and Tour Operations: Concepts and Principles. 2 edition. Kanishka Publishers Distributers, New Delhi, 2006.

Παραπομπή MLA

Negi, Jagmohan. Travel Agency and Tour Operations: Concepts and Principles. 2 edition. 2006.