| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Natural Heritage of Singapore | 978-981-06-8437-2 (981-06-8437-1) | 2009 | Hugh T.W. Tan · L.M. Chou · Peter K.L. Ng |
| The Natural Heritage of Singapore | 978-981-06-7792-3 (981-06-7792-8) | 2007 | Hugh T.W.Tan · L.M.Chou · Peter K.L.Ng |