THE STUDENTS’ ABILITY IN LEARNING TREE DIAGRAMS AT THE FIFTH SEMESTER STUDENTS OF ENGLISH STUDY PROGRAM ISLAMIC UNIVERSITY OF INDRAGIRI. JSI [Internet]. 2022 Nov. 30 [cited 2025 Oct. 9];4(2):38-47. Available from: https://ejournal-fkip.unisi.ac.id/shelves/article/view/2496