Paul Klee's Pictorial Writing.

MLA

Aichele, K. Porter. Paul Klee's Pictorial Writing. Cambridge (UK): University Press, 2002.

APA

Aichele, K. Porter. (2002). Paul Klee's Pictorial Writing. Cambridge (UK): University Press.

Chicago

Aichele, K. Porter Paul Klee's Pictorial Writing. Cambridge (UK): University Press, 2002.