Certo, Samuel C. Supervision : concepts and skill building / Samuel C. Certo. - 3rd ed. - Boston : Irwin/McGraw-Hill, 2000. - xxxv, 569 p. : ill. (some col.) ; cm. ISBN: 0072284048 Subjects--Topical Terms: Supervision of employees. LC Class. No.: HF5549.12 / .C42 2000 Dewey Class. No.: 658.3/02