Cohen,Steven P. (2002). Negotiating skills for managers. Tata McGraw Hill.
Chicago Style aipamenaCohen,Steven P. Negotiating Skills for Managers. New Delhi: Tata McGraw Hill, 2002.
MLA aipamenaCohen,Steven P. Negotiating Skills for Managers. Tata McGraw Hill, 2002.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.