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2023. Penetapan kadar fenolik total ekstrak etanol, fraksi etil asetat dan n-heksan daun kopi robusta (Coffea canephora Pierre ex A. Froehner) dengan metode spektrofotometri Uv-Vis. Journal of Pharmaceutical and Sciences. 6, 4 (Nov 2023), 1709–1716. DOI:https://doi.org/10.36490/journal-jps.com.v6i4.301.