Certo, Samuel C. Supervision : concepts and skill-building / Samuel C. Certo. - 6th ed. - Boston : McGraw-Hill/Irwin, a business unit of The McGraw-Hill Companies, Inc., c2008. - xxx, 573 p. : ill. ; 26 cm. Includes bibliographical references and index. ISBN: 9780073405001 (alk. paper) 0073405000 (alk. paper) LCCN: 2006035826 Subjects--Topical Terms: Supervision of employees. LC Class. No.: HF5549.12 / .C42 2008