Schwenk, J., Schiecke, D., Schuster, H., & Pfeifer, E. (2010). Microsoft Office Excel 2010 - Das Handbuch. Microsoft Press.

Schwenk, Jürgen, Dieter Schiecke, Helmut Schuster, and Eckehard Pfeifer. Microsoft Office Excel 2010 - Das Handbuch. Köln: Microsoft Press, 2010.

Schwenk, Jürgen, et al. Microsoft Office Excel 2010 - Das Handbuch. Microsoft Press, 2010.