SCOTT DRU. (1991). CUSTOMER SATISFACTION: THE OTHER HALF OF YOUR JOB. CRISP PUBLICATION.
Chicago Style aipamenaSCOTT DRU. CUSTOMER SATISFACTION: THE OTHER HALF OF YOUR JOB. CALIFORNIA: CRISP PUBLICATION, 1991.
MLA aipamenaSCOTT DRU. CUSTOMER SATISFACTION: THE OTHER HALF OF YOUR JOB. CRISP PUBLICATION, 1991.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.