Ilgen, Daniel R. (Editor) The changing nature of performance : implications for staffing, motivation, and development / - 1st ed. - San Francisco Jossey-Bass Publishers, 1999. - xxv, 452 p. : ill. ; 24 cm. Includes bibliographical references and indexes. ISBN: 0787946257 LC Class. No.: HF5549.5.P35 / .C36 1999