Kungsuwan, Kuntapas, Kanjana Singh, Somchai Phetkao, and Niramon Utama-ang. 2017. “Effects of pH and anthocyanin concentration on color and antioxidant activity of Clitoria ternatea extract”. Food and Applied Bioscience Journal 2 (1):31-46. https://doi.org/10.14456/fabj.2014.3.