Fells, R. (2010). Effective Negotiation. Cambridge University Press.
Cita Chicago (17th ed.)Fells, Ray. Effective Negotiation. New Delhi: Cambridge University Press, 2010.
Cita MLA (9th ed.)Fells, Ray. Effective Negotiation. Cambridge University Press, 2010.
Atenció: Aquestes cites poden no estar 100% correctes.