Laila Lutfiana, Laila. “The Effectiveness of Using Songs to Improve Students’ Mastery of Present Perfect Tense at The Eighth Grade Students of SMP Negeri 10 Purworejo in The Academic Year of 2014/2015”. Scripta : English Department Journal 6, no. 2 (November 29, 2019): 22-26. Accessed November 23, 2024. https://ebook.umpwr.ac.id/index.php/scripta/article/view/720.