Silva, W. (1964). Industrial law and relations in Ceylon; an outline of the history , the institutions and labour laws. K.V.G. De Silva.
Lua i Stíl Chicago (17ú heag.)Silva, W.P.N. Industrial Law and Relations in Ceylon; an Outline of the History , the Institutions and Labour Laws. Colombo: K.V.G. De Silva, 1964.
Lua MLA (9ú heag.)Silva, W.P.N. Industrial Law and Relations in Ceylon; an Outline of the History , the Institutions and Labour Laws. K.V.G. De Silva, 1964.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.