Tusyahdiah, N.H., Djazilan, M.S., Retnawati, T. and Mega 2023. Peningkatan Hasil Belajar Matematika Materi Sudut Melalui Model Problem Based Learning Berbantuan Benda Konkret Siswa SD. PROSIDING NATIONAL CONFERENCE FOR UMMAH. 2, 1 (Jun. 2023), 519–523.