Levitan, S. A. (1964). Reducing worktime as a means to combat unemployment. W. E. Upjohn Institute for Employment Research.
Chicago-referens (17:e uppl.)Levitan, Sar A. Reducing Worktime as a Means to Combat Unemployment. Kalamazoo, Mich.: W. E. Upjohn Institute for Employment Research, 1964.
MLA-referens (8:e uppl.)Levitan, Sar A. Reducing Worktime as a Means to Combat Unemployment. W. E. Upjohn Institute for Employment Research, 1964.
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