MAULIDIZEN, Ahmad.
 Ibn Khaldun's Economic Thought; The Fair Tax And Its Relevance To The Modern Economy.
<strong>International Journal of Islamic Business  and Economics (IJIBEC)</strong>, [S.l.], v. 3, n. 2, p. 73-89, nov. 2019.
ISSN 2615-420X.
Available at: &lt;<a href="http://e-journal.iainpekalongan.ac.id/index.php/IJIBEC/article/view/1661" target="_new">http://e-journal.iainpekalongan.ac.id/index.php/IJIBEC/article/view/1661</a>&gt;. Date accessed: 08 july 2020.
doi: <a href="https://doi.org/10.28918/ijibec.v3i2.1661">https://doi.org/10.28918/ijibec.v3i2.1661</a>.