| Board games from medieval Cork in context | Breen, Gerry | Article in Journal | | 2003 |
| Co. Wexford newspapers | Breen, Gerry | Article in Journal | | 2010 |
| Putting Ireland on four wheels : a history of Irish transport | Miller, PeterO'Sullivan, Austin M. | Monograph or Collective Volume | Coolballow Specialist Publications | 2014 |
| Rosslare in history | | Monograph or Collective Volume | Rosslare Historical Society | 2005 |
| Rosslare in history - no. 2 | | Monograph or Collective Volume | Rosslare Historical Society | 2007 |
| Setting a headline for success. The story of a Carlow emigrant who, having arrived in America penniless, went on to found a publishing empire based around 'Collier' magazine, which at the height of its success had a circulation of 4m. | Breen, Gerry | Article in Journal | | 2015 |