ANDERSON B ROBERT. (1981). PROFESSIONAL SELLING (2.). PRENTICE -HALL INTERNATIONAL, INC.
Lua i Stíl Chicago (17ú heag.)ANDERSON B ROBERT. PROFESSIONAL SELLING. 2. NEW JERSEY: PRENTICE -HALL INTERNATIONAL, INC, 1981.
Lua MLA (9ú heag.)ANDERSON B ROBERT. PROFESSIONAL SELLING. 2. PRENTICE -HALL INTERNATIONAL, INC, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.