Drucker, Peter F. The essential drucker : the best of sixty years of peter drucker's essential writings on management / Peter F. Drucker. - 2nd ed. - [S.l.] : harper business, 2001. - 358 p. ; 24 cm. ISBN: 0750650184 (hardcover) 9780750650182 (hardcover) Dewey Class. No.: 658