Gostick, Adrian Robert. The invisible employee realizing the hidden potential in everyone Adrian Gostick & Chester Elton. - Hoboken, N.J. John Wiley c2006. - xx, 152 p. ill. 23 cm. Include bibliographical reference and index ISBN: 9780471777397 Subjects--Topical Terms: DPM,DRM,AENEmployee motivation.Psychology, Industrial.