@book{BerndJ2021, author = {Schnurrenberger Bernd J.}, title = {Online-Marketing \& E-Commerce f{\"u}r KMU}, series = {das ultimative Briefing f{\"u}r Gesch{\"a}ftsleitung und Gr{\"u}nder!}, isbn = {978-3-948451-09-7}, year = {2021}, }