Mort, T. A. (1977). Systematic selling, how to influence the buying decision process. Amacom.
Lua i Stíl Chicago (17ú heag.)Mort, Terry A. Systematic Selling, How to Influence the Buying Decision Process. Amacom, 1977.
Lua MLA (8ú heag.)Mort, Terry A. Systematic Selling, How to Influence the Buying Decision Process. Amacom, 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.