Gulen, M.Fethullah : <br/><br/>
Emerald hills of the heart; vol - 4:  key concepts in the practice of sufism / 

 - New Delhi :  Adam Publishers and distributors   2012 
 - xiv, 201 p.  
<br/><br/><label>ISBN: </label>9781597842280 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Islam & religions originating in it
<br/><br/><label>Dewey Class. No.: </label>297.4  / GUL