HUSSAINI, A.; UBA, A. R.; SIFAWA, A. S. Impact of Effective Staff Development Programmes on Teachers’ Performance in Senior Secondary Schools in Sokoto State. African Journal of Humanities and Contemporary Education Research , [S. l.], v. 11, n. 1, p. 187–197, 2023. Disponível em: https://publications.afropolitanjournals.com/index.php/ajhcer/article/view/475. Acesso em: 23 sep. 2025.