| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| A Guide to the Orchids of Singapore | 978-9971-88-359-1 (9971-88-359-7) | 1995 | Hugh T. W. Tan |
| Biology of Vanda Miss Joaquim | 978-9971-69-251-3 (9971-69-251-1) | 2002 | Yam Tim Wing · Joseph Arditti · Yam Tim Wang |