Cita APA (7a ed.)

(1990). Paul Klee: The Bauhaus years 1921-1931.

Cita Chicago Style (17a ed.)

Paul Klee: The Bauhaus Years 1921-1931. San Francisco, 1990.

Cita MLA (8a ed.)

Paul Klee: The Bauhaus Years 1921-1931. 1990.