Tolong jelaskan mengenai Rujukan dari Grete Sultan dalam bahasa melayu

Bredow, Moritz von. 2012. "Rebellische Pianistin. Das Leben der Grete Sultan zwischen Berlin und New York." (Biography). Schott Music, Mainz, Germany.

Kostelanetz, Richard. 2003. Conversing with John Cage. New York: Routledge.

Revill, David. 1993. The Roaring Silence: John Cage – a Life. Arcade Publishing. ,