Lum, G. (2005). The negotiation fielbook: Simple strategies to help you negotiate everything. New York: McGraw-Hill.
Chicago Style aipamenaLum, Grande. The Negotiation Fielbook: Simple Strategies to Help You Negotiate Everything. New York: McGraw-Hill, 2005.
MLA aipamenaLum, Grande. The Negotiation Fielbook: Simple Strategies to Help You Negotiate Everything. New York: McGraw-Hill, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.