Situmorang, Erlinawati. 2020. “The Influence of Vocabulary Mastery Ability to Write Exposition Text of Eighth Grade Students of SMP Negeri 1 Satu Atap Tampahan: The Influence of Vocabulary Mastery Ability to Write Exposition Text of Eighth Grade Students of SMP Negeri 1 Satu Atap Tampahan”. Jurnal Mantik 3 (4):579-81. https://iocscience.org/ejournal/index.php/mantik/article/view/631.