Halloran J <br/><br/>
Suppervision :art of management 
Halloran J; Frunzi G L 
 - 2 
 - New Jersey  New Jersey, Prentice Hall  1986 
 - 542p 
<br/><br/><label>ISBN: </label>0-13-876392-5 
<br/><br/><label>Source: </label>Textbook