Singh, L. (2008). Fundamental of tourism and travel. Isha Books.
Lua i Stíl Chicago (17ú heag.)Singh, L.K. Fundamental of Tourism and Travel. Delhi: Isha Books, 2008.
Lua MLA (9ú heag.)Singh, L.K. Fundamental of Tourism and Travel. Isha Books, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.