Siahaan, R. D., Sitopu, T. A., Marbun, T. A., & Bukit, G. B. (2025). Enhancing Mobile Library App User Experience Using HCD and Usability Metrics. Journal of Information Systems and Informatics, 7(4), 3107-3142. https://doi.org/10.63158/journalisi.v7i4.1236