@book{GrunwaldSchwill2017, author = {Guido Grunwald and J{\"u}rgen Schwill}, title = {Beziehungsmarketing : Gestaltung nachhaltiger Gesch{\"a}ftsbeziehungen - Grundlagen und Praxis}, publisher = {Sch{\"a}ffer-Poeschel}, address = {Stuttgart}, isbn = {978-3-7910-3522-2}, pages = {361}, year = {2017}, language = {de} }