Cooper, H. (2002). Jack Tworkov: Red, white, blue.
Lua i Stíl Chicago (17ú heag.)Cooper, Harry. Jack Tworkov: Red, White, Blue. New York, 2002.
Lua MLA (8ú heag.)Cooper, Harry. Jack Tworkov: Red, White, Blue. 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.