M. Eryadi and A. N. Fradana, “Problem Based Learning Strengthens Tolerance And Moral Values In Elementary Students: Pembelajaran Berbasis Masalah Memperkuat Toleransi Dan Nilai Moral Siswa Sekolah Dasar”, ijemd, vol. 21, no. 4, p. 10.21070/ijemd.v21i4.1172, Sep. 2026.