| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 1982 United Nations List of National Parks and Protected Areas | 978-2-88032-409-4 (2-88032-409-2) | 1983 |
| Financing Protected Areas: Guidelines for Protected Area Managers | 978-2-8317-0544-6 (2-8317-0544-4) | 2000 |