Gummesson, E. (1999). Total relationship marketing. Butterworth Heinemann.
Chicago Edition CitationGummesson, Evert. Total Relationship Marketing. Oxford: Butterworth Heinemann, 1999.
Cita MLAGummesson, Evert. Total Relationship Marketing. Butterworth Heinemann, 1999.
Atenció: Aquestes cites poden no estar 100% correctes.