Taweesak Kasiphol และ Somboon Kietinun. (2007) A model development of active measures to prevent stress of elementary teachers in private school. Thammasat University,:ม.ป.ท.Taweesak Kasiphol และ Somboon Kietinun. 2007. A model development of active measures to prevent stress of elementary teachers in private school. ม.ป.ท.:Thammasat University,;Taweesak Kasiphol และ Somboon Kietinun. A model development of active measures to prevent stress of elementary teachers in private school. ม.ป.ท.:Thammasat University, 2007. Print.