Pairoj Kaewma. 2001. Constructivism in sustainable development of energy. Field of Study Environmental Education, Mahidol University;
Pairoj Kaewma. (2001) Constructivism in sustainable development of energy . Mahidol University/Bangkok.
Pairoj Kaewma. Constructivism in sustainable development of energy. . Bangkok:Mahidol University, 2001.
Pairoj Kaewma. (2001) Constructivism in sustainable development of energy . Mahidol University/Bangkok.