Godfrey, T. (1998). Conceptual art. Phaidon Press.
Lua i Stíl Chicago (17ú heag.)Godfrey, Tony. Conceptual Art. London: Phaidon Press, 1998.
Lua MLA (8ú heag.)Godfrey, Tony. Conceptual Art. Phaidon Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.