Sasithorn Soparat และ Bupphachart Tunhikorn. (2008) Developing and using a professional development model for enhancing Thai elementary science teacher teaching. Kasetsart University,:ม.ป.ท.Sasithorn Soparat และ Bupphachart Tunhikorn. 2008. Developing and using a professional development model for enhancing Thai elementary science teacher teaching. ม.ป.ท.:Kasetsart University,;Sasithorn Soparat และ Bupphachart Tunhikorn. Developing and using a professional development model for enhancing Thai elementary science teacher teaching. ม.ป.ท.:Kasetsart University, 2008. Print.