| Armagh district lunatic asylum : the first phase | Williamson, Arthur P. | Article in Journal | | 1976 |
| Enterprise, industrial development and social planning : Quakers and the emergence of the textile industry in Ireland | Williamson, Arthur P. | Article in Journal | | 1993 |
| Enterprise, industrial development and social planning : Quakers and the emergence of the textile industry in Ireland | Williamson, Arthur P. | Article in Journal | | 1992 |
| Policy for higher education in Northern Ireland : the New University of Ulster and the origins of the University of Ulster | Williamson, Arthur P. | Article in Journal | | 1993 |
| The beginnings of state care for the mentally ill in Ireland | Williamson, Arthur P. | Article in Journal | | 1970 |
| The New University of Ulster | Williamson, Arthur P. | Article in Book | | 2009 |
| Violence and the social services in Northern Ireland | | Monograph or Collective Volume | Heinemann Educational | 1978 |