Kurt Schwitters.

MLA

Cardinal, Roger, and Gwendolen Webster. Kurt Schwitters. Ostfildern: Hatje Cantz, 2011.

APA

Cardinal, R., & Webster, G. (2011). Kurt Schwitters. Ostfildern: Hatje Cantz.

Chicago

Cardinal, Roger, and Gwendolen Webster. Kurt Schwitters. Ostfildern: Hatje Cantz, 2011.