Ernoviya, Ernoviya, Afriadi Afriadi, and Hesti Nadila Silfania. “Analisis Senyawa Kafein Pada Bubuk Kopi Jenis Arabika Di Kota Takengon Menggunakan Analisis Kualitatif Dan Kuatitatif: Analysis of Caffeine Compounds in Arabica Ground Coffee in Takengon City Using Qualitative and Quantitative Analysis”. JOPS (Journal Of Pharmacy and Science) 6, no. 2 (June 30, 2023): 176–183. Accessed April 4, 2025. https://jurnal.univrab.ac.id/index.php/jops/article/view/3371.