An early mystic of Baghdad : a study of the life and teaching of Harith B. Asad al-Muhasibi, A.D.781-A.D.857 - Smith, Margaret, 1884- (New York AMS Press, 1973)
Terbitan asal 1935, oleh Sheldon Press, London.
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Keywords: al-Muhasibi, al-Harith ibn Asad, d.857 or 8