HAJI, S. Presumptive Tax System and its Influence on the Ways Informal Entrepreneurs Behave in Tanzania. UDSM Online Journal Testing, [S. l.], v. 5, n. 1-2, p. 72–90, 2015. DOI: 10.56279/ter.v5i1-2.17. Disponível em: https://testojs.udsm.ac.tz/index.php/ter/article/view/17. Acesso em: 9 jan. 2025.