Harahap, I. T.; Daulay, A. S. .; Rahman, F.; Nasution, H. M. Determination of Total Phenolic Content of Bajakah Wood (Spatholobus Littolaris Hassk.) Extract Based on Differences in Ethanol Concentration Using Uv-Vis Spectrophotometry Method. JPS 2023, 6, 1717-1728.