Hasan, Zulfikar, et al. “Pengaruh Model Problem-Based Instructional Berbasis Blended-Learning Terhadap Hasil Belajar Siswa Ditinjau Dari Kecemasan Matematis Siswa”. Research in the Mathematical and Natural Sciences, vol. 2, no. 1, May 2023, pp. 37-48, doi:10.55657/rmns.v2i1.102.