Emang และ Andrew. (1990) Factors affecting knowledge, attitude and practice of village health volunteers towards primary health care promotion. Mahidol University,:ม.ป.ท.Emang และ Andrew. 1990. Factors affecting knowledge, attitude and practice of village health volunteers towards primary health care promotion. ม.ป.ท.:Mahidol University,;Emang และ Andrew. Factors affecting knowledge, attitude and practice of village health volunteers towards primary health care promotion. ม.ป.ท.:Mahidol University, 1990. Print.