| An Irish cavalier : Daniel O'Neill | Cregan, Donal F. | Article in Journal | | 1965 |
| Daniel A. Binchy. Obituary : the road to Emmaus (Homily given by Father Donal Cregan, C.M. at the memorial mass for Professor Binchy in the University College chapel at Belfield, UCD, on 11 May 1989 | Cregan, Donal F. | Article in Journal | | 1989 |
| Daniel O'Neill, a royalist agent in Ireland, 1644-50 | Cregan, Donal F. | Article in Journal | | 1941 |
| Early modern Ireland | Cregan, Donal F. | Article in Journal | | 1978 |
| Irish Catholic admissions to the English inns of court, 1558-1625 | Cregan, Donal F. | Article in Journal | | 1970 |
| Irish recusant lawyers in politics in the reign of James I | Cregan, Donal F. | Article in Journal | | 1970 |
| Some members of the Confederation of Kilkenny | Cregan, Donal F. | Article in Book | | 1944 |
| Some unpublished letters of Cardinal Newman | | Article in Journal | | 1954 |
| The Confederate Catholics of Ireland : the personnel of the Confederation, 1642-9 | Cregan, Donal F. | Article in Journal | | 1995 |
| The confederation of Kilkenny | Cregan, Donal F. | Article in Book | | 1973 |
| The confederation of Kilkenny : its organisation, personnel, and history | Cregan, Donal | Thesis | | 1948 |
| The life of Daniel O'Neill [1612?-64] | Cregan, Donal F., Rev. | Thesis | | 1937 |
| The machinery of government in the Confederation of Kilkenny | Cregan, Donal F. | Article in Journal | | 1948 |
| The social and cultural background of a Counter-Reformation episcopate 1618-60 | Cregan, Donal F. | Article in Book | | 1979 |