APA-viite

Negi, J. (2015). Travel agency and tour operations: Concepts and principles.

Chicago-tyylinen lähdeviittaus

Negi, Jagmohan. Travel Agency and Tour Operations: Concepts and Principles. Kanishka Publishers Distributers, New Delhi, 2015.

MLA-viite

Negi, Jagmohan. Travel Agency and Tour Operations: Concepts and Principles. 2015.