Klee, P. (1975). Paul Klee: 1879 - 1940 ; September - Oktober 1975. Fischer Fine Art.
Cita Chicago (17th ed.)Klee, Paul. Paul Klee: 1879 - 1940 ; September - Oktober 1975. London: Fischer Fine Art, 1975.
Cita MLA (8th ed.)Klee, Paul. Paul Klee: 1879 - 1940 ; September - Oktober 1975. Fischer Fine Art, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.