Southville International School and Colleges Search for 'au:Porter, Michael E'

Competitive advantage : , creating and sustaining superior performance /

By Porter, Michael E.,. New York ; | Toronto : Free Press, 2004 . 557 pages : 24 cm.. 9780743260879 (pbk.) | 0743260872 (pbk.)

By Porter, Michael E.. New York : Free Press, 1998 . 396 pages : 23 cm.. 0743260880

By Porter, Michael E.. New York : Free Press, 1980 . 396 p. : 29 cm.. 0029253608