Negi, J. (2005). Travel agency operations: Concepts and principles. Kaniskha Publishers.
Lua i Stíl Chicago (17ú heag.)Negi, Jagmohan. Travel Agency Operations: Concepts and Principles. New Delhi: Kaniskha Publishers, 2005.
Lua MLA (9ú heag.)Negi, Jagmohan. Travel Agency Operations: Concepts and Principles. Kaniskha Publishers, 2005.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.