Muchammad Husni, Endang Susilowati. SISTEM E-LEARNING DALAM PEMBELAJARAN iBT TOEFL (INTERNET BASE TEST OF ENGLISH AS A FOREIGN LANGUAGE) MENGGUNAKAN MEDIA VOIP (VOICE OVER INTERNET PROTOCOL). JSH [Internet]. 7 Maret 2025 [dikutip 29 April 2026];4(2):195-212. Tersedia pada: https://journal.its.ac.id/index.php/jsh/article/view/2959