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