Flame Tree Publishing · Watson-Guptill
| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Definitive Opera Encyclopedia: New & Expanded Edition | 978-1-78361-990-0 | 2017 | Stanley Sadie |
| Definitive Opera Encyclopedia: New & Expanded Edition | 978-1-78361-651-0 | 2015 | |
| The Billboard Illustrated Encyclopedia Of Opera | 978-0-8230-7721-2 | 2004 | Stanley Sadie · Jane Bellingham |
| The Illustrated Encyclopedia Of Opera | 978-1-84451-026-9 | 2004 | Stanley Sadie |
Foreword by Philip Langridge · Philip L. · Philip Langer · Philip Longworth · Philipp Langer