Septi Wulandari, and Mauritz Pandapotan Marpaung. “PENATAPAN KADAR ALKALOID INFUSA BIJI KOPI ROBUSTA SANGRAI (Coffea Canephora Pierre Ex. A Froehner) DENGAN SPEKTROFOTOMETRI UV-VIS”. Jurnal Kesehatan : Jurnal Ilmiah Multi Sciences 12, no. 02 (December 31, 2022): 113 - 119. Accessed November 22, 2024. https://jurnal.stik-sitikhadijah.ac.id/index.php/multiscience/article/view/352.