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Rahmilia, D., Ardian, E. and Syafrizal 2022. THE STUDENTS’ ABILITY IN LEARNING TREE DIAGRAMS AT THE FIFTH SEMESTER STUDENTS OF ENGLISH STUDY PROGRAM ISLAMIC UNIVERSITY OF INDRAGIRI. J-Shelves of Indragiri (JSI). 4, 1 (Nov. 2022), 38–47. DOI:https://doi.org/10.61672/jsi.v4i1.2496.