Aaker, D. A. (2004). Brand Portfolio Strategy. Free Press.
Lua i Stíl Chicago (17ú heag.)Aaker, David A. Brand Portfolio Strategy. Free Press, 2004.
Lua MLA (9ú heag.)Aaker, David A. Brand Portfolio Strategy. Free Press, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.