APA (7th ed.) Citation

Irwin, D., & Klee, P. (1967). Paul Klee. Knowledge Publications.

Chicago Style (17th ed.) Citation

Irwin, David, and Paul Klee. Paul Klee. London: Knowledge Publications, 1967.

MLA (9th ed.) Citation

Irwin, David, and Paul Klee. Paul Klee. Knowledge Publications, 1967.

Warning: These citations may not always be 100% accurate.