Drucker, Peter Ferdinand, 1909- The effective executive / Peter F. Drucker. - 1st Harper colophon ed. - New York : Harper & Row, 1985, c1967. - viii, 178 p. ; 21 cm. - Harper colophon books . Includes index. ISBN: 006091209X (pbk.) Subjects--Topical Terms: Executives--United States.Decision-making. LC Class. No.: HD38.25.U6 / D78 1985 Dewey Class. No.: 658.4