[1]
I. F. Arifin, A. A. Musaddad, and S. Sudiyanto, “PBL (Problem Based Learning) Model Based on Constructivist Sosioculturalism: Theory and Concept of The Millennial Era of Learning Model”, yupa. hist. stud. j., vol. 2, no. 2, pp. 115-125, Dec. 2018.