BLANKENSHIP. (1993). State Of The Art Marketing Research. NTC.
Lua i Stíl Chicago (17ú heag.)BLANKENSHIP. State Of The Art Marketing Research. NTC, 1993.
Lua MLA (8ú heag.)BLANKENSHIP. State Of The Art Marketing Research. NTC, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.