Kreetha Kaewkhong. 2010. The development of an inquiry-based learning unit in light reflection and refraction. Institute for Innovative Learning, Mahidol University;
Kreetha Kaewkhong. (2010) The development of an inquiry-based learning unit in light reflection and refraction . Mahidol University/Bangkok.
Kreetha Kaewkhong. The development of an inquiry-based learning unit in light reflection and refraction. . Bangkok:Mahidol University, 2010.
Kreetha Kaewkhong. (2010) The development of an inquiry-based learning unit in light reflection and refraction . Mahidol University/Bangkok.