Muchammad Husni, dan Endang Susilowati. 2025. “SISTEM E-LEARNING DALAM PEMBELAJARAN IBT TOEFL (INTERNET BASE TEST OF ENGLISH AS A FOREIGN LANGUAGE) MENGGUNAKAN MEDIA VOIP (VOICE OVER INTERNET PROTOCOL)”. Jurnal Sosial Humaniora 4 (2):195-212. https://journal.its.ac.id/index.php/jsh/article/view/2959.