Lings, Martin. <br/><br/>
What is Sufism? / 
Martin Lings. 
 - London :  George Allen and Unwin Ltd.,  1975. 
 - 3-133 p. ;  23 cm. 
<br/><br/>Includes bibliogr. references and indexes. 
<br/><br/><label>ISBN: </label>0042970318 0042970326 (pbk.) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Sufism.