Rumbiak M, Setiawan J. Evaluasi Usability Website library.umn.ac.id Universitas Multimedia Nusantara. Ultima InfoSys : Jurnal Ilmu Sistem Informasi [Internet]. 31Dec.2017 [cited 26Apr.2024];8(2):87-4. Available from: https://ejournals.umn.ac.id/index.php/SI/article/view/618