Arns, I. (2003). Irwin: Retroprincip ; 1983 - 2003. Revolver.
Lua i Stíl Chicago (17ú heag.)Arns, Inke. Irwin: Retroprincip ; 1983 - 2003. Frankfurt am Main: Revolver, 2003.
Lua MLA (8ú heag.)Arns, Inke. Irwin: Retroprincip ; 1983 - 2003. Revolver, 2003.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.