| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| International Relations: A General Theory | 978-0-521-04396-0 (0-521-04396-4) | 1965 |
| Systems, States, Diplomacy and Rules | 978-0-521-14821-4 (0-521-14821-9) | 2010 |
| Systems, states, diplomacy and rules | 978-0-521-07316-5 (0-521-07316-2) | 1968 |