Rosaria, Dewi. “Study On The Problems In The Process Of Teaching And Learning English Focusing On Active And Passive Voice For The Six Year Classes Of SD Negeri Bitahan 1 Rantau”. Institute 2, no. 2 (Agustus-Desember) (Oktober 23, 2021): (52 – 64). Diakses November 22, 2024. https://ojs.uvayabjm.ac.id/index.php/institute/article/view/217.