De Silva, W. P. N. (1978). Industrial conflict: A study of trade union strategy and the law. Lake House Investments.
Lua i Stíl Chicago (17ú heag.)De Silva, W. P. N. Industrial Conflict: A Study of Trade Union Strategy and the Law. Colombo: Lake House Investments, 1978.
Lua MLA (8ú heag.)De Silva, W. P. N. Industrial Conflict: A Study of Trade Union Strategy and the Law. Lake House Investments, 1978.
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