Carl McDaniel, Jr., & Gates Roger. (2004). Marketing Research Essentials (4th.). John Wiley&Sons,Inc.
Lua i Stíl Chicago (17ú heag.)Carl McDaniel, Jr., agus Gates Roger. Marketing Research Essentials. 4th. USA: John Wiley&Sons,Inc, 2004.
Lua MLA (9ú heag.)Carl McDaniel, et al. Marketing Research Essentials. 4th. John Wiley&Sons,Inc, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.