| Parliament of Ceylon 1970 - The Ceylon Daily News | H.B.W. | Abeynaike | 1970 | Politics |
| Parliament of Ceylon 1977 - Ceylon Daily News | H.B.W. | Abeynaike | 1977 | Politics |
| Parliament of Sri Lanka - 9th | W.P.P. | De Silva | 1989 | Politics |
| Parliament of Sri Lanka - Gen Elec 1977, By-Elections 1977-86, Referendum 1982, Pres Elect 1982 | N/A | N/A | 1989 | Politics |
| Parliamentary Democracy - A Comparative Study of the English System | N. M., Dr | Perera | 2002 | Politics |
| Parliamentary General Election - 15 February 1989, Report | International Observer Group | N/A | 1989 | Politics |
| Parliamentary Government in Ceylon 1948-1958 | S. | Namasivayam | 1959 | Politics |
| Participatory Development & Dependence - Marga, Vol 5, No 3 | Godfrey | Gunatilleke | 1978 | General |
| Passionately Cricket | Anura | Tennekoon | 2020 | General |
| Pastoral Letter - Towards The Rebuilding of The Sri Lankan Nation | Catholic Bishops of Sri Lanka | N/A | 1984 | Religion |
| Path of Buddhism, The | Lanka Bauddha Mandalaya | N/A | N/A | Religion |
| Pathways to the Peak | Dinusha & Shalini | Panditaratne | 2011 | General |
| Patriot and the Artist, The: An Appreciation - P.E.P.Deraniyagala | Ranil | Deraniyagala | 1980 | General |
| Patriots of Lanka, Book 2 | P. N. | Cumaranatunga | 2009 | General |
| Patterns of Community Structure in Colombo, Sri Lanka | Neville S | Arachchige-Don | 1994 | General |
| Paul Deraniyagala Scholar and Man | R.W.M. | Dias | 1980 | General |
| PAYE - Guide For Employees | Dept of Inland Revenue | N/A | 1971 | General |
| Peace & Conflict In A Poor Country: Sri Lanka | Bernard | Swan | 1986 | General |
| Peace at Last in Paradise | Ananda W.P. | Guruge | 2010 | General |
| Peace Constitution for Sri Lanka | S.S | Bala | N/A | General |
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