Putera, D., Yamin, Y., & Firdaus, T. (2024). Reducing Coffee Acidity and Caffeine through the Roasting Method using Azadirachtaindica Firewood. Hydrogen: Jurnal Kependidikan Kimia, 12(3), 512–525. https://doi.org/10.33394/hjkk.v12i3.12140