Rummler, G. A. (2007). Serious performance consulting. According to Rummler. Pfeiffer.
Lua i Stíl Chicago (17ú heag.)Rummler, Geary A. Serious Performance Consulting. According to Rummler. San Francisco: Pfeiffer, 2007.
Lua MLA (9ú heag.)Rummler, Geary A. Serious Performance Consulting. According to Rummler. Pfeiffer, 2007.
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