Sanorkan, J., Tina, F. W., Hemtanon, S., Maesutha, M., Keeratipattarakorn, K., Chumsri, A., & Sirijirakal, V. J. (2019). Plastic Types and Usage by People in Nakhon Si Thammarat Rajabhat University Area, Nakhon Si Thammarat Province. Wichcha Journal Nakhon Si Thammarat Rajabhat University, 38(1), 42–52. retrieved from https://li01.tci-thaijo.org/index.php/wichcha/article/view/163338