Competitive strategy: Techniques for analyzing industries and competitors 
[by] Porter, E. Michael. 
 - New York,  Free press,  1998 
 - 396p. 
<br/><br/><label>ISBN: </label>9780743260886 
<br/><br/><label>Subjects--Topical Terms: </label>--School of Business and Education
<br/><br/><label>Dewey Class. No.: </label>HD41 .P67 1998