Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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