Paul Klee, notebooks volume 2 :
the nature of nature /
edited by Jürg Spiller ; trans. by Heinz Norden.

APA Citation

Klee, P., Spiller, J. (1973). Paul Klee, notebooks volume 2: the nature of nature. New York: G. Wittenborn.

MLA Citation

Klee, Paul, 1879-1940, and Jürg Spiller. Paul Klee, Notebooks Volume 2: the Nature of Nature. New York: G. Wittenborn, 1973.

Warning: These citations may not always be complete (especially for serials).