Gerhard Bowering-Bilal Orfali <br/><br/>
The Comfort of the Mystics  A Manual and Anthology of Early Sufism 

 -  Brill  2013 
 - Islamic History and Civilization: Studies and Texts .
<br/><br/><label>ISBN: </label>9789004233614 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Islam <br/> Sufi<br/>RELIGION <br/>Sufism--Early works to 1800.