Rahman, N., Marliyati, S. A., Damanik, M. R. M., & Anwar, F. (2013). Antioxidant Activity and Total Phenol Content of Ethanol Extract Takokak Fruit (Solanum torvum). Pakistan Journal of Nutrition, 12(11), 973–977. https://doi.org/10.3923/pjn.2013.973.977