Harahap, N.F. and Mailani, E. 2023. PENGEMBANGAN E-LKPD BERBASIS QR-CODE MELALUI MODEL PROBLEM BASED LEARNING PADA MATERI BANGUN DATAR DI KELAS IV SEKOLAH DASAR. JURNAL HANDAYANI PGSD FIP UNIMED. 14, 2 (Dec. 2023), 39–52. DOI:https://doi.org/10.24114/jh.v14i2.47398.