Humphreys, R. S. (1969). The Ayyubids of Damascus, 589-658/ 1193-1260: A principality in medieval Syria. University Microfilms International.
Citazione stile Chigago Style (17a edizione)Humphreys, Richard Stephen. The Ayyubids of Damascus, 589-658/ 1193-1260: A Principality in Medieval Syria. Ann Arbor: University Microfilms International, 1969.
Citatione MLA (9a ed.)Humphreys, Richard Stephen. The Ayyubids of Damascus, 589-658/ 1193-1260: A Principality in Medieval Syria. University Microfilms International, 1969.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.