Dewi, W. S., Maimunah, and Nahor Murani Hutapea. “Pengaruh Penerapan Model Problem Based Learning Terhadap Peningkatan Self Efficacy Siswa SMP Kota Pekanbaru”. Pi: Mathematics Education Journal, vol. 7, no. 1, June 2024, pp. 49-56, doi:10.21067/pmej.v7i1.9607.