HAJI, S. Presumptive Tax System and its Influence on the Ways Informal Entrepreneurs Behave in Tanzania. Tanzanian Economic Review, [S. l.], v. 5, n. 1-2, p. 72–90, 2015. Disponível em: https://ter.udsm.ac.tz/index.php/ter/article/view/17. Acesso em: 28 nov. 2022.