| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Non-Governmental Organizations in World Politics | 978-0-415-38125-3 (0-415-38125-8) | 2010 |
| Pressure Groups in the Global System | 978-0-312-64162-7 (0-312-64162-1) | 1982 |
| The Conscience of the World: The Influence of Non-Governmental Organisations in the UN System | 978-0-8157-9419-6 (0-8157-9419-3) | 1996 |
Brookings Institution Press · Routledge · St. Martin's Press