Paul Klee

MLA

Cooper, Douglas. Paul Klee. Reprinted in 1950 Harmondsworth: Penguin books, 1950.

APA

Cooper, D. (1950). Paul Klee. Reprinted in 1950 Harmondsworth: Penguin books.

Chicago

Cooper, Douglas Paul Klee. Reprinted in 1950 Harmondsworth: Penguin books, 1950.