B, G. et al. 2021. PENGARUH MODEL PEMBELAJARAN PROBLEM BASED INSTRUCTION (PBI) BERBASIS LITERASI MATEMATIKA TERHADAP KETERAMPILAN BERPIKIR KRITIS PEMBELAJARAN MATEMATIKA SISWA KELAS IV SE-GUGUS II. JURNAL HANDAYANI PGSD FIP UNIMED. 12, 2 (Dec. 2021), 75–81. DOI:https://doi.org/10.24114/jh.v12i2.34182.