Sumruay Yotawichit. (1988) Parental practice of parental role responsibilies in child care and child rearing. Mahidol University,:ม.ป.ท.Sumruay Yotawichit. 1988. Parental practice of parental role responsibilies in child care and child rearing. ม.ป.ท.:Mahidol University,;Sumruay Yotawichit. Parental practice of parental role responsibilies in child care and child rearing. ม.ป.ท.:Mahidol University, 1988. Print.