Malhotra, R. (1998). Socio environmental and legal issues in toursim. Anmol Publishers.
Lua i Stíl Chicago (17ú heag.)Malhotra, R. Socio Environmental and Legal Issues in Toursim. New Delhi: Anmol Publishers, 1998.
Lua MLA (9ú heag.)Malhotra, R. Socio Environmental and Legal Issues in Toursim. Anmol Publishers, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.