Rohmah, Vikit, and Laurentius Nugraha. “THE IMPLEMENTATION OF PBX (PASSIVE BOX) IN TEACHING PASSIVE VOICE”. ELT Forum: Journal of English Language Teaching 6, no. 2 (December 20, 2017): 184-190. Accessed July 17, 2024. https://journal.unnes.ac.id/sju/elt/article/view/20700.