Febrianti, A.A. et al. 2026. Analysis of project-based learning implementation on Indonesian language mastery of fifth-grade students. Primary: Jurnal Pendidikan Guru Sekolah Dasar. 15, 2 (Apr. 2026), 314–325. DOI:https://doi.org/10.33578/jpfkip.v15i2.314-325.