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 The Vassal Class in the Era of the Crusades.
<strong>Journal of Tikrit university for humanities - مجلة جامعة تكريت للعلوم الانسانية</strong>, [S.l.], v. 28, n. 1, p. 294-278, feb. 2021.
ISSN 1817-6798. Available at: &lt;<a href="https://jtuh.tu.edu.iq/index.php/hum/article/view/1205" target="_new">https://jtuh.tu.edu.iq/index.php/hum/article/view/1205</a>&gt;. Date accessed: 22 july 2024.
doi: <a href="http://dx.doi.org/10.25130/hum.v28i1.1205">http://dx.doi.org/10.25130/hum.v28i1.1205</a>.