Yupin Neamsang. 1985. Comparative study of breastfeeding promotion method. Bangkok:Mahidol University;
Yupin Neamsang. (1985) Comparative study of breastfeeding promotion method (รายงานผลงานวิจัย). Mahidol University:Bangkok.
Yupin Neamsang. Comparative study of breastfeeding promotion method. Bangkok:Mahidol University, 1985.
Yupin Neamsang. (1985) Comparative study of breastfeeding promotion method (รายงานผลงานวิจัย). Mahidol University:Bangkok.