Gaya APA

Crone, P. (1986). God's caliph: religious authority in the first centuries of Islam / Patricia Crone and Martin Hinds . : cambridge university press.

Gaya MLA

Crone, Patricia. "God's caliph: religious authority in the first centuries of Islam / Patricia Crone and Martin Hinds". : cambridge university press, 1986. Referensi.