Vibharaj Prasertsook. 2002. The cost-benefit analysis and environmental conciousness of staff and students of certified environmental management system ISO 14001 in secondary schools under the General Education Department in Bangkok Metropolitan. Field of Study Technology of Environmental Management, Mahidol University;

Vibharaj Prasertsook. The cost-benefit analysis and environmental conciousness of staff and students of certified environmental management system ISO 14001 in secondary schools under the General Education Department in Bangkok Metropolitan. . Bangkok:Mahidol University, 2002.

Vibharaj Prasertsook. (2002) The cost-benefit analysis and environmental conciousness of staff and students of certified environmental management system ISO 14001 in secondary schools under the General Education Department in Bangkok Metropolitan . Mahidol University/Bangkok.