| 19th century images of Hartford's Irish-Catholic community (1827-1861) | Duffy, Joseph | Article in Journal | | 1986 |
| A patron for passers-by : Benedict Joseph Labre | | Article in Book | | 1998 |
| Clogher record album : a diocesan history | | Monograph or Collective Volume | Cumann Seanchais Chlochair | 1975 |
| Commemorating Macartan | Duffy, Joseph | Article in Journal | | 2009 |
| Images of Hartford's Irish-Catholic community : 1827-1867 | Duffy, Joseph | Article in Journal | | 1990 |
| Medieval Monaghan : the evidence of the placenames | Duffy, Joseph see Ó Dufaigh, SeosamhÓ Dufaigh, Seosamh | Article in Journal | | 1999 |
| Monaghan cathedral | Duffy, Joseph | Monograph or Collective Volume | Eason | 1992 |
| Northern Ireland. The way forward as I see it (1) | Duffy, Joseph | Article in Journal | | 1982 |
| Patrick in his own words | Duffy, Joseph | Monograph or Collective Volume | Veritas | 1972 |
| The original statuary | Duffy, Joseph | Article in Book | | 1998 |
| The stained glass | | Article in Book | | 1998 |