Porter,Michael E. <br/><br/>
Competitive Advantage.  Creating and Sustaining Superior Performance. 
Michael E.Porter 
 - New York  The Free Press.  1985 
 - 557p. 
<br/><br/> Hard cover 
<br/><br/><label>ISBN: </label>0029250900 
<br/><br/><label>Standard No.: </label>0029250900 
<br/><br/><label>Dewey Class. No.: </label>338.6048