Coffin, R. A. (1973). The negotiator: A manual for winners. AMACOM.
Lua i Stíl Chicago (17ú heag.)Coffin, Royce A. The Negotiator: A Manual for Winners. New York: AMACOM, 1973.
Lua MLA (9ú heag.)Coffin, Royce A. The Negotiator: A Manual for Winners. AMACOM, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.