ebrary, Inc, & Carson, D. (2001). Qualitative marketing research. SAGE.
Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus David Carson. Qualitative Marketing Research. London ; Thousand Oaks, Calif.: SAGE, 2001.
Lua MLA (9ú heag.)ebrary, Inc, agus David Carson. Qualitative Marketing Research. SAGE, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.