Marpaung FDN, Supriadi, Resti Citra Dewi. LEARNING TREE DIAGRAMS IN SYNTAX: STUDENTS’ DIFFICULTIES AND LEARNING STRATEGIES. JEE [Internet]. 2026 Jun. 11 [cited 2026 Jun. 16];12(1):224-41. Available from: https://journal.upp.ac.id/index.php/JEE/article/view/4538