Lawong, Amin, and Charnnarong Saikaew. “Factors and Optimal Operating Condition of Process Factors Affecting the Quality of Polyethylene Terephthalate Bottle”. Asia-Pacific Journal of Science and Technology 19, no. 3 (April 13, 2017): 385–398. Accessed May 17, 2024. https://so01.tci-thaijo.org/index.php/APST/article/view/82964.