Ṭabarī, 8., & Humphreys, R. S. (1990). The crisis of the early caliphate. State University of New York Press.
Lua i Stíl Chicago (17ú heag.)Ṭabarī, 838?-923, agus R. Stephen Humphreys. The Crisis of the Early Caliphate. Albany, N.Y.: State University of New York Press, 1990.
Lua MLA (9ú heag.)Ṭabarī, 838?-923, agus R. Stephen Humphreys. The Crisis of the Early Caliphate. State University of New York Press, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.