Gummesson, E. (1999). Total relationship marketing. Butterworth Heinemann.
Chicago Style aipamenaGummesson, Evert. Total Relationship Marketing. Oxford: Butterworth Heinemann, 1999.
MLA aipamenaGummesson, Evert. Total Relationship Marketing. Butterworth Heinemann, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.