Drucker, Peter F. 1909-2005. The effective executive [by] Peter F. Drucker. - London, Heinemann, 1967. - viii, 148 p. 22 1/2 cm. LCCN: 67092516 LC Class. No.: HD38 .D68 1967 / .D68 1967a Dewey Class. No.: 658.4