Sidabutar, Gilberto, Jesslyn Seah, and Yerik Singgalen. “Analysis and Design of Web-Based Information System for Coffeeshop Management Using Design Thinking Methodology: Case of Kopi KurangLebih”. Journal of Information Systems and Informatics 5, no. 1 (March 5, 2023): 217-231. Accessed October 2, 2025. https://journal-isi.org/index.php/isi/article/view/455.