Lewicki, R. J. B. (2016). Essentials of Negotiation. John Wiley and Sons.
Lua i Stíl Chicago (17ú heag.)Lewicki, Roy J; Barry. Essentials of Negotiation. New Jersey: John Wiley and Sons, 2016.
Lua MLA (9ú heag.)Lewicki, Roy J; Barry. Essentials of Negotiation. John Wiley and Sons, 2016.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.