ISBN 0-690-08811-X==External links==*"Die Verwandlung der Welt in Musik" on IMDB*Wolfgang Wagner Photo Gallery* Wolfgang Wagner – "Daily Telegraph" obituary* Wolfgang Wagner obituary – "Guardian" obituary* Wolfgang Wagner: director of the Bayreuth Festival Opera "Times" obituary
* "Die Verwandlung der Welt in Musik" on IMDB* Wolfgang Wagner Photo Gallery* Wolfgang Wagner — "Daily Telegraph" obituary* Wolfgang Wagner obituary — "Guardian" obituary* Wolfgang Wagner: director of the Bayreuth Festival Opera "Times" obituary