Simon, M. (2006). Endlich fit in Excel. Data Becker.
Lua i Stíl Chicago (17ú heag.)Simon, Martina. Endlich Fit in Excel. Düsseldorf: Data Becker, 2006.
Lua MLA (8ú heag.)Simon, Martina. Endlich Fit in Excel. Data Becker, 2006.
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