Flag of the Umayyad Dynasty (660–750)
Own work

Yijiu JIN (2017)       Islam, BRILL, p. 91  ISBN:  978-90-474-2800-8. 
Galina Yemelianova (2022)       Islamic Leadership and the State in Eurasia, Anthem Press, p. 29  ISBN:  978-1-83998-053-4.
Ch1902