Webster, G. (1997). Kurt Merz Schwitters: A biographical study.
Cita Chicago (17th ed.)Webster, Gwendolen. Kurt Merz Schwitters: A Biographical Study. 1997.
Cita MLA (8th ed.)Webster, Gwendolen. Kurt Merz Schwitters: A Biographical Study. 1997.
Atenció: Aquestes cites poden no estar 100% correctes.