PEPPERS DON. (1999). ONE TO ONE MANAGER. DOUBLEDAY.
Chicago Style aipamenaPEPPERS DON. ONE TO ONE MANAGER. NEW YORK: DOUBLEDAY, 1999.
MLA aipamenaPEPPERS DON. ONE TO ONE MANAGER. DOUBLEDAY, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.