Sember , Brette Mcwhorter Bad apples : How to manage difficult employees, encourage good ones to stay and boost productivity / Brette mcwhorter sember - Massachusetts ; Adams business , 2010 - 235 p . ; ill. 20 cm. ISBN: 9781605500041 Subjects--Topical Terms: Employee motivation Dewey Class. No.: 658.3124 / SEM P10B