Socialist Workers League. (1945). Labour Challenge: A monthly paper bringing the truth about labour's struggle for socialism to the working people of Canada. Toronto.
Chicago Style (17th ed.) CitationSocialist Workers League. Labour Challenge: A Monthly Paper Bringing the Truth About Labour's Struggle for Socialism to the Working People of Canada. Toronto, 1945.
MLA (8th ed.) CitationSocialist Workers League. Labour Challenge: A Monthly Paper Bringing the Truth About Labour's Struggle for Socialism to the Working People of Canada. Toronto, 1945.
Warning: These citations may not always be 100% accurate.