Purintraphiban, S., and S. Poonpaerdchon. “Effect of Tea Processing on Quality and Antioxidant Properties of Gac Fruit Peel Tea”. RMUTSB ACADEMIC JOURNAL, vol. 8, no. 1, June 2020, pp. 28-38, https://li01.tci-thaijo.org/index.php/rmutsb-sci/article/view/224086.