HILTROP J M. (1997). ESSENCE OF NEGOTIATION. PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)HILTROP J M. ESSENCE OF NEGOTIATION. NEW DELHI: PRENTICE -HALL INTERNATIONAL, INC, 1997.
Lua MLA (9ú heag.)HILTROP J M. ESSENCE OF NEGOTIATION. PRENTICE -HALL INTERNATIONAL, INC, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.