Holt Douglas B. (2004). How Brands Become Icons. Harvard Business School.
Lua i Stíl Chicago (17ú heag.)Holt Douglas B. How Brands Become Icons. Boston: Harvard Business School, 2004.
Lua MLA (9ú heag.)Holt Douglas B. How Brands Become Icons. Harvard Business School, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.