Johnson G <br/><br/>
Exploring corporate strategy: Text and cases 
Johnson G; Scholes K 
 - Ed 3 
 - New York  New York, Prentice-Hall  1993 
 - 733p 
<br/><br/><label>ISBN: </label>0-13-297441-X 
<br/><br/><label>Source: </label>Textbook