Kaunang และ Yvonne Margaretha. (1999) Factors influencing breast feeding practices of mothers in North Sulawesi province, Indonesia. Mahidol University,:ม.ป.ท.Kaunang และ Yvonne Margaretha. 1999. Factors influencing breast feeding practices of mothers in North Sulawesi province, Indonesia. ม.ป.ท.:Mahidol University,;Kaunang และ Yvonne Margaretha. Factors influencing breast feeding practices of mothers in North Sulawesi province, Indonesia. ม.ป.ท.:Mahidol University, 1999. Print.