Whitlatch, Jo Bell. <br/><br/>
Evaluating reference services :  a practical guide / 

 - Chicago :  American Library Association,  2000. 
 - vi, 226 p. ; 
<br/><br/><label>ISBN: </label>0838907873 (alk. paper) 
<br/><br/><label>Dewey Class. No.: </label>025.5/2  / WHI