Manhas & Parikshat singh. (2012). Sustainable and responsible tourism: Trends prachies &cases. PHI learning pvt .ltd.
芝加哥风格引文Manhas 与 Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. New Delhi: PHI learning pvt .ltd, 2012.
MLA引文Manhas 与 Parikshat singh. Sustainable and Responsible Tourism: Trends Prachies &cases. PHI learning pvt .ltd, 2012.
警告：这些引文格式不一定是100％准确.