Howitt, M. (1999). Handbook of good business practice. London: International Thomson Business.
Chicago Style aipamenaHowitt, Mark. Handbook of Good Business Practice. London: International Thomson Business, 1999.
MLA aipamenaHowitt, Mark. Handbook of Good Business Practice. London: International Thomson Business, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.