Kirkpatrick, Donald L. Implementing the four levels : a practical guide for effective evaluation of training programs / Donald L. Kirkpatrick, James D. Kirkpatrick. - San Francisco : Berrett-Koehler Publishers, 2007. - xii, 153 pages : illustrations ; 24 cm. Includes index. Includes bibliographical references. ISBN: 9781576754542 Subjects--Topical Terms: Employees--Training of --Evaluation. Dewey Class. No.: 658.312404