Silalahi, Dumaris E. “The Effect of Using Mind Mapping Technique in Writing Descriptive Text at the First Year Students of SMA Negeri 4 Pematangsiantar”. Journal of English Teaching as a Foreign Language 2, no. 1 (June 30, 2016): 1-6. Accessed May 19, 2024. https://ejournal.uhn.ac.id/index.php/jetafl/article/view/156.