Bopp, Richard E. <br/><br/>
Reference and Information Services 
/ by Richard E. Bopp  
 - 3rd ed. 
 - Englewood;  Libraries Unlimited:  2001. 
 - xxiv, 617p. 
<br/><br/><label>ISBN: </label>1563086247 
<br/><br/><label>Dewey Class. No.: </label>025.52  / BOP/R