“The Effectiveness of Using Clustering Technique To Improve Students’ Vocabulary Mastery: (The Quasi-Experimental Research Conducted in the Second Grade of Junior High School)”. ELang | An English Language Education Journal 10, no. 1 (April 1, 2025): 89–100. Accessed August 20, 2026. https://ejournal.unibba.ac.id/index.php/elang/article/view/1772.