A Conceptual Review of the Challenges of Effective Tax Collection from the Informal Sector in Kano, Nigeria. Journal of Business Management and Accounting, [S. l.], v. 9, n. 1, p. 1–13, 2019. DOI: 10.32890/jbma2019.9.1.8737. Disponível em: https://www.educationmalaysia.co.uk/index.php/jbma/article/view/8737. Acesso em: 10 nov. 2025.