Drucker, Peter F. 1909-2005 Innovation and entrepreneurship : practice and principles / Peter F. Drucker - Rev. ed. - New York : Routledge , Taylor & Francis Group , c2007. - xvi, 256p. : 23cm. - The Classic Drucker Collection . Includes index ISBN: 9781138654013 9781138019195 Subjects--Topical Terms: EntrepreneurshipBusiness planning Dewey Class. No.: 658.42