Kitāb firaq al-shīʻah.

MLA

Nawbakhtī, al-Ḥasan ibn Mūsá and Hellmut Ritter. Kitāb firaq al-shīʻah. [Place of publication not identified] : [publisher not identified], [1931]

APA

Nawbakhtī, A. & Ritter, H. (1931). Kitāb firaq al-shīʻah. [Place of publication not identified] : [publisher not identified].

Chicago

Nawbakhtī, al-Ḥasan ibn Mūsá and Hellmut Ritter. Kitāb firaq al-shīʻah. Edited by Hellmut Ritter. [Place of publication not identified] : [publisher not identified], [1931]