Bopp, Richard E. <br/><br/>
Reference and Information Services   : An Introduction 
/ by  Richard E. Bopp et.al. 
 - 3rd ed. 
 - Chennai:  Libraries Unlimited,  2001 
 - xxiv,617p. 
<br/><br/><label>ISBN: </label>9781563086243 
<br/><br/><label>Dewey Class. No.: </label>025.52  / BOP/R