Callcenter-Controlling
von Patrick, Ulrich
Becker, Wolfgang, Ammermann, Jens Christian, Ulrich, Patrick, Marr, Julia: Callcenter-Controlling, W. Kohlhammer, 2010.
von Patrick, Ulrich
Becker, Wolfgang, Ammermann, Jens Christian, Ulrich, Patrick, Marr, Julia: Callcenter-Controlling, W. Kohlhammer, 2010.