Lewicki, R. J. (1994). Negotiation (2nd ed.). Irwin.
Lua i Stíl Chicago (17ú heag.)Lewicki, Roy J. Negotiation. 2nd ed. Burr Ridge, Ill: Irwin, 1994.
Lua MLA (9ú heag.)Lewicki, Roy J. Negotiation. 2nd ed. Irwin, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.