PENINGKATAN HASIL MENGAJAR GURU MENGGUNAKAN PORTOFOLIO MELALUI AKTIVITAS MGMP. JURNAL PENA EDUKASI, [S. l.], v. 6, n. 1, p. 15–20, 2019. DOI: 10.54314/jpe.v6i1.279. Disponível em: https://jurnal.goretanpena.com/index.php/JPE/article/view/279.. Acesso em: 4 sep. 2026.