Free Trade Unions from the I[nternational] C[onfederation of] F[ree] T[rade] U[nions, at ..., London, ... on 7th December 1949]. British Trades Unions Congress].
Chicago Style (17th ed.) CitationFree Trade Unions from the I[nternational] C[onfederation of] F[ree] T[rade] U[nions, at ..., London, ... on 7th December 1949]. British Trades Unions Congress].
MLA (8th ed.) CitationFree Trade Unions from the I[nternational] C[onfederation of] F[ree] T[rade] U[nions, at ..., London, ... on 7th December 1949]. British Trades Unions Congress].
Warning: These citations may not always be 100% accurate.