Jack C. Richards  <br/><br/>
Interchange 4th Edition 

 - 
 -  "Cambridge University Press,New Delhi"  2015 
<br/><br/><label>ISBN: </label>9781107571082 
<br/><br/><label>Subjects--Topical Terms: </label><br/>computer science
<br/><br/><label>Dewey Class. No.: </label>1  Q15