Aaker, D. (1995). Marketing research (5th.). John wiley.
Lua i Stíl Chicago (17ú heag.)Aaker, David. Marketing Research. 5th. New york: John wiley, 1995.
Lua MLA (9ú heag.)Aaker, David. Marketing Research. 5th. John wiley, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.