| title | ISBN-13 (ISBN-10) | year of publica- tion | |
|---|---|---|---|
| Apple Identifier Palms: The Illustrated Identifier to Over 100 Palm Species | 978-1-84092-277-6 (1-84092-277-X) | 2000 | |
| Guide to Palms | 978-0-7858-1562-4 (0-7858-1562-7) | 2003 | |
| Palmen. Das neue kompakte Bestimmungsbuch | 978-3-8290-1285-0 (3-8290-1285-3) | 1999 |