Certo, S. Supervision : concepts and skill-building Certo, Samuel C. - 4th edition - McGraw-Hill higher Education, c2003 - xxxii, 560 pages ; 25 cm. Includes bibliographical references and index ISBN: 0-07-248839-5 Subjects--Topical Terms: Dewey Class. No.: Circ. 658.3 C418 2003