A. . Putri, S. . Deliani, dan A. . Syahputra, “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, vol. 1, no. 2, hlm. 1–10, Apr 2022.