| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Wagner Rehearsing the 'Ring': An Eye-Witness Account of the Stage Rehearsals of the First Bayreuth Festival | Paperback | 978-0-521-10718-1 (0-521-10718-0) | 2009 |
| Wagner Rehearsing the 'Ring': An Eye-Witness Account of the Stage Rehearsals of the First Bayreuth Festival | Hardcover | 978-0-521-23722-2 (0-521-23722-X) | 1983 |