SIMBOLON, RINCI; SILALAHI, Saraswati. The Effectiveness of Project-Based Learning on 21st-Century Skills in Elementary Schools: A Literature Review. BASICA, [S. l.], v. 5, n. 2, 2026. Disponível em: https://ejournal.insuriponorogo.ac.id/index.php/basica/article/view/10291. Acesso em: 30 jul. 2026.