Gaya APA

Nierenberg, J., Ros, I, S. (2003). The Secret f Successsful Negotiation: Efective Strategies to Improve Your Negotiating Skills . London: Duncan Baird Publisher.

Gaya MLA

Nierenberg, Juliet., Ros, Irene, S. "The Secret f Successsful Negotiation: Efective Strategies to Improve Your Negotiating Skills". London: Duncan Baird Publisher, 2003. Text.