| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2002 | 978-1-84388-014-1 | Siarter y cwsmer | |
| '' | 978-1-84388-019-6 | Canllaw i bensiynwyr: Manteisio i'r eithaf ar help a chyngor y llywodraeth | |
| 2005 | 978-1-84388-763-8 | Great Britain | Women and Pensions: The Evidence |