Kitāb tabaqāt al-muʿtazila / taʾlīf : Aḥmad Ibn-Yaḥyā Ibn-al-Murtaḍā. ʿUniyat bi-taḥqīqihī: Susanna Diwald-Wilzer. Bairūt : Imprimerie catholique : in Komm Franz Steiner Verlag, 1961