Hopcroft, John E. <br/><br/>
Introduction to automata theory, languages, and computation 

 - 2nd ed. 
 -  Pearson Education, Asia  2002 
 - xiv, 521 
<br/><br/><label>ISBN: </label>9788178083476 
<br/><br/><label>Dewey Class. No.: </label>Column-18