Yaowares Chaiyen และ Naruemon Yutakom. (2007) Teaching and learning about chemical equilibrium : constructivist-based perspectives. Kasetsart University,:ม.ป.ท.Yaowares Chaiyen และ Naruemon Yutakom. 2007. Teaching and learning about chemical equilibrium : constructivist-based perspectives. ม.ป.ท.:Kasetsart University,;Yaowares Chaiyen และ Naruemon Yutakom. Teaching and learning about chemical equilibrium : constructivist-based perspectives. ม.ป.ท.:Kasetsart University, 2007. Print.