Putri A, Deliani S, Syahputra A. THE EFFECT OF PROBLEM BASED LEARNING MODEL ON THE ABILITY TO WRITE PROCEDURE TEXT IN STUDENTS OF CLASS XI SMA AL–MAKSUM CINTA RAKYAT STUDY YEAR 2021-2022. J.LUMRA [Internet]. 26 April 2022 [dikutip 18 Agustus 2025];1(2):1-10. Tersedia pada: http://siakad.univamedan.ac.id/ojs/index.php/lumbung_aksara/article/view/355