Lewicki, R. J., & Litterer, J. A. (1985). Negotiation. IRWIN.
Lua i Stíl Chicago (17ú heag.)Lewicki, Roy J., agus Joseph A. Litterer. Negotiation. Illinois: IRWIN, 1985.
Lua MLA (9ú heag.)Lewicki, Roy J., agus Joseph A. Litterer. Negotiation. IRWIN, 1985.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.