KURTZ, D. L., & DODGE, H. R. (1991). Professional selling.-- Ed.6. Irwin.
Lua i Stíl Chicago (17ú heag.)KURTZ, David L., agus H. Robert DODGE. Professional Selling.-- Ed.6. Homewood: Irwin, 1991.
Lua MLA (9ú heag.)KURTZ, David L., agus H. Robert DODGE. Professional Selling.-- Ed.6. Irwin, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.