MAULIDIZEN, Ahmad. Ibn Khaldun's Economic Thought; The Fair Tax And Its Relevance To The Modern Economy. International Journal of Islamic Business and Economics (IJIBEC), [S.l.], p. 73-88, nov. 2019. ISSN 2615-420X. Available at: <http://e-journal.iainpekalongan.ac.id/index.php/IJIBEC/article/view/1661>. Date accessed: 11 dec. 2019. doi: https://doi.org/10.28918/ijibec.v3i2.1661.