ILWANDRI. Development of Connected-Pjbl Model Book Validation Instruments. Indonesia Journal of Engineering and Education Technology (IJEET), [S. l.], v. 1, n. 3, p. 30–32, 2023. DOI: 10.61991/ijeet.v1i3.5. Disponível em: https://journal.ataker.ac.id/index.php/ijeet/article/view/5. Acesso em: 14 jul. 2025.