APA aipamena

johnston.mark w. (2008). relationship selling. new york: Mcgraw hill.

Chicago Style aipamena

johnston.mark w. Relationship Selling. new york: Mcgraw hill, 2008.

MLA aipamena

johnston.mark w. Relationship Selling. new york: Mcgraw hill, 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.