Ponente, N. (1960). Klee: Biographical and critical study. Skira, [distributed by World Pub. Co., Cleveland.
Lua i Stíl Chicago (17ú heag.)Ponente, Nello. Klee: Biographical and Critical Study. [Lausanne]: Skira, [distributed by World Pub. Co., Cleveland, 1960.
Lua MLA (9ú heag.)Ponente, Nello. Klee: Biographical and Critical Study. Skira, [distributed by World Pub. Co., Cleveland, 1960.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.