Lavanya D, Guna shekhar G, Purushothom A, and Pallavi A. 2018. “Green Chemistry: A Study on Acid-Base Indicator Property of Various Flower Pigments”. International Journal of Research and Development in Pharmacy & Life Sciences 7 (6):3155 -63. https://doi.org/10.21276/IJRDPL.2278-0238.2018.7(6).3155-3163.