Cita APA (7th ed.)

Ṭabarī, 8., & Humphreys, R. S. (1990). The crisis of the early caliphate. State University of New York Press.

Cita Chicago (17th ed.)

Ṭabarī, 838?-923, i R. Stephen Humphreys. The Crisis of the Early Caliphate. Albany, N.Y.: State University of New York Press, 1990.

Cita MLA (9th ed.)

Ṭabarī, 838?-923, i R. Stephen Humphreys. The Crisis of the Early Caliphate. State University of New York Press, 1990.