Ṭabarī, 8., & Humphreys, R. S. (1990). The crisis of the early caliphate. Albany, N.Y.: State University of New York Press.
استشهاد بنمط شيكاغوṬabarī, 838?-923,, و R. Stephen Humphreys. The Crisis of the Early Caliphate. Albany, N.Y.: State University of New York Press, 1990.
MLA استشهادṬabarī, 838?-923,, و R. Stephen Humphreys. The Crisis of the Early Caliphate. Albany, N.Y.: State University of New York Press, 1990.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.