Camelia, Windy. “The Effect Of Using Hello English Application On Students’ Ability in Writing Active And Passive Voice At The Eleventh Grade Students Of SMAN 9 Mandau”. Jolly Journal of English Education 2, no. 2 (December 31, 2024): 86–105. Accessed September 26, 2025. https://ejournal.staihwduri.ac.id/index.php/jjee/article/view/97.