©2013 National Research Council of Thailand
Ladda Pimjan. 2004. Knowledge and awareness of Mathayomsuksa III students of participation on Chao Phraya river conservation in Nonthaburi province. Field of Study Environmental Education, Mahidol University;
Ladda Pimjan. (2004) Knowledge and awareness of Mathayomsuksa III students of participation on Chao Phraya river conservation in Nonthaburi province . Mahidol University/Bangkok.
Ladda Pimjan. Knowledge and awareness of Mathayomsuksa III students of participation on Chao Phraya river conservation in Nonthaburi province. . Bangkok:Mahidol University, 2004.
Ladda Pimjan. (2004) Knowledge and awareness of Mathayomsuksa III students of participation on Chao Phraya river conservation in Nonthaburi province . Mahidol University/Bangkok.