Gülen, Fethullah. <br/><br/>
Key concepts in the practice of Sufism :  emerald hills of the heart / 
M. Fethullah Gülen ; translated by Ali Ünal. 
 - New Jersey  Tughra Books  2011 
 - v. <1-4> ;  23 cm. 
<br/><br/> Vol. 1 originally published as a single volume manifestation withoug subtitle.  Vol. 3-4 published: Somerset, N.J. : Tughra Books. 
<br/><br/><label>ISBN: </label>1932099239 (v. 1 : pbk.) 1932099247 (v. 1 : hbk.) 9781932099751 (v. 2 : pbk.) 9781932099775 (v. 2 : hbk.) 9781597842044 (v. 3 : pbk.) 9781597841368 (v. 3 : hbk.) 9781597842280 (v. 4 : pbk.) 9781597842136 (v. 4 : hbk.) 9781932099249 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sufism--Doctrines.
<br/><br/><label>Dewey Class. No.: </label>297.4  / G5581