Ratiporn Teungfung และผู้แต่งคนอื่นๆ. (2009) Parental time use for child rearing and preschool child behavior : a comparision between urban and rural areas in central region. National Institute of Development Administration:ม.ป.ท.Ratiporn Teungfung และผู้แต่งคนอื่นๆ. 2009. Parental time use for child rearing and preschool child behavior : a comparision between urban and rural areas in central region. ม.ป.ท.:National Institute of Development Administration;Ratiporn Teungfung และผู้แต่งคนอื่นๆ. Parental time use for child rearing and preschool child behavior : a comparision between urban and rural areas in central region. ม.ป.ท.:National Institute of Development Administration, 2009. Print.