スイス自由民主党 - Wikipedia“FDP. The Liberals”. Template:Cite webの呼び出しエラー：引数 accessdate は必須です。Ruedin, Didier (2013). “Obtaining Party Positions on Immigration in Switzerland: Comparing Different Methods”. Swiss Political Science Review 19: 84–105. doi:10.1111/spsr.12018.Ruedin, Didier (2013). “Obtaining Party Positions on Immigration in Switzerland: Comparing Different Methods”. Swiss Political Science Review 19 (1): 84-105
