Klein K J <br/><br/>
Multilevel theory, research and methods in organizations 
Klein K J; Kozlowski S W J 
 - New Jersey  New Jersey, Jossey-Bass  2000 
 - 605p 
<br/><br/><label>ISBN: </label>0-7879-5228-1 
<br/><br/><label>Source: </label>Textbook