SIMANULLANG, Horale Tua; SUJANTO, Bedjo; ARBAH, Fakhrudin. School Principal Performance Improvement Through Leadership Transformational and Affective Commitment . Migration Letters, London, UK, v. 21, n. 2, p. 1131–1145, 2023. Disponível em: https://migrationletters.com/index.php/ml/article/view/7057. Acesso em: 19 nov. 2025.