TANTRA, Manggala Wiriya. Pengembangan Instrumen Penilaian Moralitas (Sila) Peserta Didik Sekolah Menengah Pertama Dengan Metode R&D Borg and Gall. FOUNDASIA, [S. l.], v. 13, n. 2, p. 49–60, 2023. DOI: 10.21831/foundasia.v13i2.57501. Disponível em: https://journal.uny.ac.id/index.php/foundasia/article/view/57501. Acesso em: 13 may. 2025.