RICHARDS DICK. (2004). ART OF WINNING COMMITMENT. AMACOM.
Chicago Style aipamenaRICHARDS DICK. ART OF WINNING COMMITMENT. NEW YORK: AMACOM, 2004.
MLA aipamenaRICHARDS DICK. ART OF WINNING COMMITMENT. AMACOM, 2004.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.