Saharuddin, Prihatmono MW. Analisis Usability Google Classrroom Menggunakan Metode Skala Likert. Progres [Internet]. 2020Sep.30 [cited 2025Apr.28];12(2):53-1. Available from: https://www.jurnal.stmikprofesional.ac.id/index.php/Progress/article/view/184