| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Fidelio. English National Opera Guide 4 | 978-0-7145-3823-5 (0-7145-3823-X) | 1980 | Ludwig van Beethoven · Joseph Ferdinand Sonnleithner · Tom Hammond |
| Tannhauser | 978-0-7145-4147-1 (0-7145-4147-8) | 1988 | Richard Wagner |