APA

Spoerri E., Baumann D., Gomez E. M., Wertein G. C., Milkwaukee Art Museum & American Folk Art Museum. (2003). The art of Adolf Wölfli. New York: American Folk Art Museum.

Chicago

Spoerri Elka, Baumann Daniel, Gomez Edward M, Wertein Gerard C, Milkwaukee Art Museum and American Folk Art Museum. 2003. The art of Adolf Wölfli. New York: American Folk Art Museum.

Harvard

Spoerri E., Baumann D., Gomez E. M., Wertein G. C., Milkwaukee Art Museum and American Folk Art Museum. (2003). The art of Adolf Wölfli. New York: American Folk Art Museum.

MLA

Spoerri Elka, Baumann Daniel, Gomez Edward M, Wertein Gerard C, Milkwaukee Art Museum and American Folk Art Museum. The art of Adolf Wölfli. New York: American Folk Art Museum. 2003.