Farrell, D. M. (1997). Comparing electoral systems. Prentice Hall/Harvester Wheatsheaf.
Lua i Stíl Chicago (17ú heag.)Farrell, David M. Comparing Electoral Systems. London: Prentice Hall/Harvester Wheatsheaf, 1997.
Lua MLA (9ú heag.)Farrell, David M. Comparing Electoral Systems. Prentice Hall/Harvester Wheatsheaf, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.