Muzi Marpaung, A. .; Rizki Pramesthi, B. P. . Effect of PH and Added Sugar on Stability of Color, Anthocyanin Content and Phenolic Content of Clitoria Ternatea, Ipomoea Tricolor and Brassica Oleracea Extracts. Agr. Nat. Resour. 2020, 54, 273–278.