SIBURIAN, Panigoran. Determinant Factors of Teacher Performance of Elementary School in Deli Serdang District North Sumatra. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 33, n. 2, p. 34–56, 2017. Disponível em: https://www.gssrr.org/JournalOfBasicAndApplied/article/view/7225. Acesso em: 17 sep. 2025.