D S · Duncan Stewart Beard · Stewart Duncan · William Duncan Patterson Stewart
| title | ISBN-13 | year of publication |
|---|---|---|
| Frieda findet einen Freund: Ein Dudaki der Koala Buch | 978-0-9805523-6-2 | 2010 |
| Frieda Finds a Friend: a Dudaki the koala book | 978-0-9805523-4-8 | 2009 |
| Frieda no Atarashi Tomodachi: Kuara no Dudaki | 978-0-9805523-7-9 | 2010 |
| Investing in a World of Risk | 978-0-9805523-3-1 | 2009 |