| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Forest Policy and Conservation of Papua New Guinea's Forests: A Critique | 978-9980-75-054-9 (9980-75-054-5) | 1993 |
| The Sustainability of Papua New Guinea's Forest Resource | 978-9980-75-062-4 (9980-75-062-6) | 1994 |