Manhas & Parikshat singh. (2012). Sustainable and responsible tourism: Trends prachies &cases. PHI learning pvt .ltd.
Citazione stile Chigago Style (17a edizione)Manhas e Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. New Delhi: PHI learning pvt .ltd, 2012.
Citatione MLA (9a ed.)Manhas e Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. PHI learning pvt .ltd, 2012.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.