Certo, Samuel C. Supervision : concepts and skill-building / Samuel C. Certo. - 7th - New York : McGraw-Hill/Irwin, 2010. - xxviii, 584 p.: ill. 25 cm. Includes index English ISBN: 978-0-07-122045-3 Subjects--Topical Terms: Supervision of employees LC Class. No.: 658.302 C33s