1. and (1979). Task Design and Employee Motivation, Scott, Foresman, and Company, Glenview, Ill.
2. Measurement of perceived task characteristics.
3. (1940a). Citizens Without Work: A Study of the Effects of Unemployment upon the Workers' Social Relations and Practices, Yale University Press, New Haven, CT.
4. (1940b). The Unemployed Worker, Yale University Press, New Haven, CT.