Mitasari, D. ., Noor Kholid, M. and Anggoro Hermawan, D. (2024) “IMPROVING WRITTEN COMMUNICATION SKILLS IN MATHEMATICS LEARNING THROUGH PROBLEM-BASED LEARNING IN GRADE XII STUDENTS”, Jurnal PTK dan Pendidikan, 10(1), pp. 57–65. doi: 10.18592/ptk.v10i1.12670.