Manivone Phongsopha และ Piriya Pholphirul. (2017) Early childhood education and child development outcomes in least developed countries: empirical evidence from Lao PDR. National Institute of Development Administration:ม.ป.ท.Manivone Phongsopha และ Piriya Pholphirul. 2017. Early childhood education and child development outcomes in least developed countries: empirical evidence from Lao PDR. ม.ป.ท.:National Institute of Development Administration;Manivone Phongsopha และ Piriya Pholphirul. Early childhood education and child development outcomes in least developed countries: empirical evidence from Lao PDR. ม.ป.ท.:National Institute of Development Administration, 2017. Print.