Rosaria, Dewi. 2021. “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 (2 (Agustus-Desember):(52 - 64). https://ojs.uvayabjm.ac.id/index.php/institute/article/view/217.