WITEK, J. (1992). Response Television John Witek. NTC Business Books.
Lua i Stíl Chicago (17ú heag.)WITEK, John. Response Television John Witek. NTC Business Books, 1992.
Lua MLA (8ú heag.)WITEK, John. Response Television John Witek. NTC Business Books, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.