ADEMOLA, A. . Professional Competence and Skills of Library Personnel in the 21st Century Reference Services. University of Ibadan Journal of Library and Information Science , [S. l.], v. 2, n. 2, p. 30–50, 2023. Disponível em: https://journals.ibadanedu.com/index.php/uijlis/article/view/812. Acesso em: 29 sep. 2026.