Sidauruk, A., Silalahi, D. E., & Herman. (2020). The Effect of Problem Based Learning (PBL) on Writing Recount Text at Grade Ten of SMK Negeri 2 Pematangsiantar. Journal of English Teaching As a Foreign Language, 6(1), 29-43. Retrieved from https://ejournal.uhn.ac.id/index.php/jetafl/article/view/109