Ponchanok Ounbangluang. 2001. The utilization of heat insulation to reduce energy consumption of the bottle-top drinking water cooler. Field of Study Appropriate Technology for Resources and Environmental Development, Mahidol University;

Ponchanok Ounbangluang. The utilization of heat insulation to reduce energy consumption of the bottle-top drinking water cooler. . Bangkok:Mahidol University, 2001.

Ponchanok Ounbangluang. (2001) The utilization of heat insulation to reduce energy consumption of the bottle-top drinking water cooler . Mahidol University/Bangkok.