“Analisis Kadar Kafein Dalam Green Bean Dan Roasted Bean Kopi Robusta (Coffea Canephora) Temanggung Menggunakan Spektrofotometer UV: Analysis of Caffeine Levels in Green Bean and Roasted Bean of Robusta Coffee (Coffea Canephora) Temanggung Using UV Spectrophotometer”. Jurnal Sains dan Kesehatan 4, no. 6 (November 14, 2024): 577–584. Accessed April 19, 2025. https://jsk.ff.unmul.ac.id/index.php/JSK/article/view/474.