TY - CHAP U1 - Buchbeitrag A1 - Zerres, Christopher A1 - Israel, Kai A1 - Tscheulin, Dieter K. T1 - Online-Marketing-Controlling T2 - Handbuch Marketing-Controlling Y1 - 2017 SN - 9783662504055 SB - 9783662504055 SP - 173 EP - 190 PB - Springer Gabler ER -