Sutrisna, Sang Gede, I Wayan Sujana, and Didith Pramunditya Ambara. “Problem-Based E-Book on Coffee Business Economic Activity Material in Social and Science Learning”. Mimbar Ilmu 29, no. 2 (October 21, 2024). Accessed November 29, 2024. https://ejournal.undiksha.ac.id/index.php/MI/article/view/83102.