Sipser,MichaelTang,ChangjieXipusai <br/><br/>
Introduction to the theory of computation,3rd Ed. 

 - 3 rd Ed 
 - Delhi   Cengage learning India Pvt. Ltd.  2013 
 - 458 
<br/><br/><label>ISBN: </label>9788130000000 
<br/><br/><label>Dewey Class. No.: </label>511.35/SIP