Singh, L. (2008). Trends in travel and tourism and laws. Isha Books.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSingh, L.K. Trends in Travel and Tourism and Laws. Delhi: Isha Books, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSingh, L.K. Trends in Travel and Tourism and Laws. Isha Books, 2008.
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