Rewald, S., & Klee, F. (1988). Paul Klee: An interview with Felix Klee by Sabine Rewald.
Lua i Stíl Chicago (17ú heag.)Rewald, Sabine, agus Felix Klee. Paul Klee: An Interview with Felix Klee by Sabine Rewald. New York, 1988.
Lua MLA (8ú heag.)Rewald, Sabine, agus Felix Klee. Paul Klee: An Interview with Felix Klee by Sabine Rewald. 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.