Yanai และ Hideki. (1990) A case study on affecting factors to the performance level of model mothers in rural area of Chiangmai province. Mahidol University,:ม.ป.ท.Yanai และ Hideki. 1990. A case study on affecting factors to the performance level of model mothers in rural area of Chiangmai province. ม.ป.ท.:Mahidol University,;Yanai และ Hideki. A case study on affecting factors to the performance level of model mothers in rural area of Chiangmai province. ม.ป.ท.:Mahidol University, 1990. Print.