Arifin IF, Musaddad AA, Sudiyanto S. PBL (Problem Based Learning) Model Based on Constructivist Sosioculturalism: Theory and Concept of The Millennial Era of Learning Model. yupa. hist. stud. j. [Internet]. 2018Dec.31 [cited 2024May2];2(2):115-2. Available from: https://jurnal.fkip.unmul.ac.id/index.php/yupa/article/view/122