Maqfirah, Z., Nasution, M. A., Nasution, M. P. and Nasution, H. M. (2023) “The determination of total flavonoid content of ethanol extract of ethyl acetate and n-hexane fractions in cocoa (Theobroma cacao L.) leaves using uv-vis spectrophotometry method”, Journal of Pharmaceutical and Sciences, 6(4), pp. 1534–1543. doi: 10.36490/journal-jps.com.v6i4.43.