Lamb, C. W., & McDaniel, C. D. (1996). Marketing (3rd.ed.). South-Western.
Lua i Stíl Chicago (17ú heag.)Lamb, Charles W., agus Carl D. McDaniel. Marketing. 3rd.ed. Cincinnati: South-Western, 1996.
Lua MLA (9ú heag.)Lamb, Charles W., agus Carl D. McDaniel. Marketing. 3rd.ed. South-Western, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.