Bértona, F. C., & Guerra, S. Earthquake or hurricane?: The rise and fall of populist parties in Poland. Absorbing the blow : populist parties and their impact on parties and party systems.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Bértona, Fernando Casal, و Simona Guerra. "Earthquake or Hurricane?: The Rise and Fall of Populist Parties in Poland." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Bértona, Fernando Casal, و Simona Guerra. "Earthquake or Hurricane?: The Rise and Fall of Populist Parties in Poland." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems, .
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.