Manhas & Parikshat singh. (2012). Sustainable and responsible tourism: Trends prachies &cases. PHI learning pvt .ltd.
Chicago-viite (17. p.)Manhas ja Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. New Delhi: PHI learning pvt .ltd, 2012.
MLA-viite (9. p.)Manhas ja Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. PHI learning pvt .ltd, 2012.
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