TIMES RESEARCH FOUNDATION. (1983). SELECT READINGS ON PRODUCTIVITY. TIMES RESEARCH FOUNDATION.
Chicago-referens (17:e uppl.)TIMES RESEARCH FOUNDATION. SELECT READINGS ON PRODUCTIVITY. BOMBAY: TIMES RESEARCH FOUNDATION, 1983.
MLA-referens (9:e uppl.)TIMES RESEARCH FOUNDATION. SELECT READINGS ON PRODUCTIVITY. TIMES RESEARCH FOUNDATION, 1983.
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