Kunking, Putcharin, Sirirat Padchaiyo, Porntida Kwawtasri, Anurak Chitbuengphrao, Anchana Preechaworapun, and Kulwadee Pinwattana. 2022. “SIMPLE ANALYSIS OF VITAMIN C IN FRUIT JUICE SAMPLES BY ELECTROCHEMISTRY”. PSRU Journal of Science and Technology 7 (3). Phitsanulok, Thailand:22-34. https://ph01.tci-thaijo.org/index.php/Scipsru/article/view/249196.