PANGARIBUAN, Wanapri; MANULLANG, Jongga; SIBURIAN, Paningkat. Determining Factors of Senior High School Principals. International Journal of Sciences: Basic and Applied Research (IJSBAR), Jordan, v. 25, n. 2, p. 44–57, 2016. Disponível em: https://gssrr.org/JournalOfBasicAndApplied/article/view/5105. Acesso em: 10 dec. 2025.