Roji, Fahrur, Dihliza Basya, and Fatih Al - Fauzi. “The Application of Multimedia Based Zello Walkie Talkie in Improving First Grade Students’ Speaking Skill at SMK Kesehatan Medika Farma”. Jurnal Educazione : Jurnal Pendidikan, Pembelajaran dan Bimbingan dan konseling 6, no. 1 (May 1, 2018): 24–30. Accessed July 22, 2024. https://ejurnal.uij.ac.id/index.php/EDU/article/view/568.