| 75th anniversary year (1933-2008) : The story of Saint Martin's Church and the Southern Church mission to Ballymacarrett | McMullan, Gordon | Monograph or Collective Volume | [St Martin's Church] | 2008 |
| The Church of Ireland Diocese of Down and Dromore from a welfare state perspective, 1945-1980 | McMullan, Gordon | Thesis | | |
| The development of clerical trade unionism in the north of Ireland during the twentieth century | McMullan, Gordon | Thesis | | |
| The Irish bank 'strike', 1919 | McMullan, Gordon | Article in Journal | | 1979 |