Bakke, Dennis. Joy at work : a revolutionary approach to fun on the job / Dennis W. Bakke. - Seattle, WA : PVG, c2005. - 314 p., [8] p. of plates : ill. ; 25 cm. ISBN: 0976268604 LCCN: 2004116572 LC Class. No.: HD57.7 .B348 2005 / .B348 2005 Dewey Class. No.: 658.3/14