THE INFLUENCE OF PROBLEM BASED LEARNING ON THE STUDENTS’ WRITING SKILL IN HORTATORY EXPOSITION TEXT AT ELEVENTH GRADE OF SMA SAIDIYAH AROSBAYA. SELL [Internet]. 2021 Aug. 30 [cited 2026 Jan. 18];6(2):112-27. Available from: http://publikasi.stkippgri-bkl.ac.id/index.php/SL/article/view/671