Khairan, K. et al. 2024. Evaluating Extraction Methods for Caffeine Content in Gayo Arabica Coffee Oil through Gas Chromatography-Mass Spectroscopy. Grimsa Journal of Science Engineering and Technology. 2, 1 (Apr. 2024), 43–51. DOI:https://doi.org/10.61975/gjset.v2i1.31.