MC Daniel, C. (1991). contemporary marketing research. West pub Co.
Lua i Stíl Chicago (17ú heag.)MC Daniel, Carl. Contemporary Marketing Research. St paul: West pub Co, 1991.
Lua MLA (9ú heag.)MC Daniel, Carl. Contemporary Marketing Research. West pub Co, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.