Ka, Rori Theresia, and Kurnia Kusumawati. “Proximate Analysis and Determination of Vitamin C Levels in Sungai Penuh Robusta Coffee Cascara (Coffea Canephora) Using UV-Vis Spectrophotometric Method”. Sainstech Farma: Jurnal Ilmu Kefarmasian 17, no. 2 (August 18, 2024): 65–69. Accessed September 17, 2025. https://journal.istn.ac.id/index.php/saintechfarma/article/view/1940.