Bản mẫu:Integrate-section

• Atlas of Electoral Systems of the World Colour-coded world maps showing the electoral systems used by every democratic country in the world, also available with more details as tables of text. Part of the information on Electoral Systems offered by the World Policy Institute (WPI)'s Project for Global Democracy & Human Rights
• Proportional Representation Library
• Quantifying Representativity Article by Philip Kestelman
• FairVote: The Center for Voting and Democracy
• PR page from old CVD web site.
• PR page from new CVD web site.
• The De Borda Institute A Northern Ireland-based organisation promoting inclusive voting procedures
• Electoral Reform Society Founded in England in 1884, the ERS is the longest running PR organization. This site contains particularly good information about Single Transferable Vote—the Society's preferred form of PR.
• Proportional Representation Society of Australia
• PR page at Center for Range Voting
• Fair Vote Canada
• LocalParty.Org California
• Voting methods survey Describes 19 multi-winner systems
• PR Simulator A web-based application that converts historical or theoretical voting data into proportional results
• Why Not Proportional Representation?
• Vote Dilution means Voters have Less Voice Law is Cool site
• PR Simulator Results (US Election 2004) An example of how the above PR Simulator can be used - in this case following the failed Colorado proposal to assign Electoral College votes proportionally