Youna Chatrine Bachtiar (2023) “THE EFFECT OF PROBLEM BASED LEARNING MODEL BASED ON REACT APPROACH ON STUDENTS’ 21ST CENTURY SKILLS: META-ANALYSIS”, International Journal of Educational Review, Law And Social Sciences (IJERLAS), 3(5), pp. 1576–1589. doi: 10.54443/ijerlas.v3i5.1047.