Humphreys, J. H. (1911). Proportional representation: A study in methods of election. Methuen & co., ltd.
Lua i Stíl Chicago (17ú heag.)Humphreys, John H. Proportional Representation: A Study in Methods of Election. London: Methuen & co., ltd, 1911.
Lua MLA (8ú heag.)Humphreys, John H. Proportional Representation: A Study in Methods of Election. Methuen & co., ltd, 1911.
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