Petchrada Orchaiyapoom. 2001. The role of members of natural resource and conservation club on environmental conservation activities in academic institute. Field of Study Environmental Management of Technology, Mahidol University;
Petchrada Orchaiyapoom. (2001) The role of members of natural resource and conservation club on environmental conservation activities in academic institute . Mahidol University/Bangkok.
Petchrada Orchaiyapoom. The role of members of natural resource and conservation club on environmental conservation activities in academic institute. . Bangkok:Mahidol University, 2001.
Petchrada Orchaiyapoom. (2001) The role of members of natural resource and conservation club on environmental conservation activities in academic institute . Mahidol University/Bangkok.