A.G. Mugunthakumar, K. Nandhini and S. Nandhini (2018) “An empirical study on reason for unhappiness in human life with refrence to Erode ”, International journal of intellectual advancements and research in engineering computations, 6(2), pp. 1023–1026. doi: 10.61096/ijiarec.v6.iss2.2018.1023-1026.