Nattawut Pawarnvate และ Ketvalee Porkaew. (2009) A survey of Thai parents' attitudes towards importance of pre-kindergarten schooling and major considerations in choosing pre-kindergarten schools for children. Thammasat University:ม.ป.ท.Nattawut Pawarnvate และ Ketvalee Porkaew. 2009. A survey of Thai parents' attitudes towards importance of pre-kindergarten schooling and major considerations in choosing pre-kindergarten schools for children. ม.ป.ท.:Thammasat University;Nattawut Pawarnvate และ Ketvalee Porkaew. A survey of Thai parents' attitudes towards importance of pre-kindergarten schooling and major considerations in choosing pre-kindergarten schools for children. ม.ป.ท.:Thammasat University, 2009. Print.