Jackson, R. W. (1996). Sales and sales managementRalph W. Jackson, Robert D. Hisrich. Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Jackson, Ralph W. Sales and Sales ManagementRalph W. Jackson, Robert D. Hisrich. Prentice Hall, 1996.
Lua MLA (8ú heag.)Jackson, Ralph W. Sales and Sales ManagementRalph W. Jackson, Robert D. Hisrich. Prentice Hall, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.