Boyce , T. (2006). Successful contract negotiation. Viva.
Lua i Stíl Chicago (17ú heag.)Boyce , Tim. Successful Contract Negotiation. New Delhi: Viva, 2006.
Lua MLA (9ú heag.)Boyce , Tim. Successful Contract Negotiation. Viva, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.