Παραπομπή APA

Gummesson, E. (1999). Total relationship marketing. Butterworth Heinemann.

Παραπομπή Chicago Style

Gummesson, Evert. Total Relationship Marketing. Oxford: Butterworth Heinemann, 1999.

Παραπομπή MLA

Gummesson, Evert. Total Relationship Marketing. Butterworth Heinemann, 1999.