Kudielka, R., & Riley, B. (2002). Paul Klee: The nature of creation ; works 1914 - 1940 / Robert Kudielka. Hayward Gallery.
Lua i Stíl Chicago (17ú heag.)Kudielka, Robert, agus Bridget Riley. Paul Klee: The Nature of Creation ; Works 1914 - 1940 / Robert Kudielka. London: Hayward Gallery, 2002.
Lua MLA (8ú heag.)Kudielka, Robert, agus Bridget Riley. Paul Klee: The Nature of Creation ; Works 1914 - 1940 / Robert Kudielka. Hayward Gallery, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.