Yulia, R., Adnan, A. Z., & Putra, D. P. (2016). Caffeine analysis from Luwak Coffee in different types of Coffees, Luwak Species and Processed by using TLC Scanner Method. Jurnal Sains Farmasi & Klinis, 2(2), 171–175. https://doi.org/10.29208/jsfk.2016.2.2.66