Siregar, Nurfauziah. 2017. “A PROBLEM-BASED METACOGNITIVE APPROACH TO MATHEMATICS LEARNING”. REKOGNISI : Jurnal Pendidikan Dan Kependidikan (E-ISSN 2599-2260) 2 (2):1-20. https://jurnal.unusu.ac.id/index.php/rekognisi/article/view/64.