Putri, Clarita, and Rudi Sutomo. “E Evaluation of Ultima InfoSys Site Usability Using Usability Test & System Usability Scale Method”. Ultima InfoSys : Jurnal Ilmu Sistem Informasi 13, no. 2 (January 31, 2023): 85-93. Accessed July 22, 2024. https://ejournals.umn.ac.id/index.php/SI/article/view/2812.