SMITH BENSON. (2003). DISCOVER YOUR SALES STRENGTHS: HOW THE WORLD`S GREATEST SALESPEOPLE DEVELOP WINNING CAREERS. WARNER BOOK.
Lua i Stíl Chicago (17ú heag.)SMITH BENSON. DISCOVER YOUR SALES STRENGTHS: HOW THE WORLD`S GREATEST SALESPEOPLE DEVELOP WINNING CAREERS. NEW YORK: WARNER BOOK, 2003.
Lua MLA (9ú heag.)SMITH BENSON. DISCOVER YOUR SALES STRENGTHS: HOW THE WORLD`S GREATEST SALESPEOPLE DEVELOP WINNING CAREERS. WARNER BOOK, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.