Putri, Yulia Nanda, Muhammad Amin Nasution, Ridwanto Ridwanto, and Anny Sartika Daulay. 2023. “Determination of Total Phenolic Content of Ethanol Extract, Ethyl Acetate and N-Hexan Fraction of Robusta Coffee Leaves (Coffea Canephora Pierre Ex A. Froehner) Using Uv-Vis Spectrofotometry Method”. Journal of Pharmaceutical and Sciences 6 (4):1709-16. https://doi.org/10.36490/journal-jps.com.v6i4.301.