PENGARUH MODEL PROBLEM BASED LEARNING BERBASIS DISKURSUS MULTI REPRESENTASI (DMR) TERHADAP TERHADAP PEMAHAMAN KONSEP MATERI SEJARAH SISWA KELAS XI SMKS MAHARDHIKA. IPSSJ [Internet]. 2026 Jun. 19 [cited 2026 Oct. 21];3(06 Juni):3870-82. Available from: https://ipssj.com/index.php/ojs/article/view/1551