| Forth the banners go : reminiscences of William O'Brien, as told to Edward MacLysaght | O'Brien, William | Monograph or Collective Volume | Three Candles | 1969 |
| From William O'Brien to de Valera: John Herlihy (1863-1941), a forgotten editor | Maume, Patrick | Article in Journal | | 2013 |
| The rake's progress of a syndicalist : The political career of William O'Brien, Irish labour leader | Lysaght, D. R. O'Connor | Article in Journal | | 1983 |
| The rakes' progress of a syndicalist : the political career of William O'Brien, Irish labour leader | O'Connor Lysaght, D. R. | Article in Journal | | 1983 |
| William O'Brien, 1881-1968 : socialist, republican, Dáil deputy, editor, and trade union leader | Morrissey, Thomas J. | Monograph or Collective Volume | Four Courts | 2007 |
| William O'Brien, 1881-1968 and the Irish labour movement | Mitchell, Arthur | Article in Journal | | 1971 |