de Lange, S. L. From limited multipartism to extended multipartism?: The impact of the Lijst Pim Fortuyn, the Partij voor de Vrijheid and the Socialistische Partij on the Dutch party system. Absorbing the blow : populist parties and their impact on parties and party systems.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)de Lange, Sarah L. "From Limited Multipartism to Extended Multipartism?: The Impact of the Lijst Pim Fortuyn, the Partij Voor De Vrijheid and the Socialistische Partij on the Dutch Party System." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems .
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)de Lange, Sarah L. "From Limited Multipartism to Extended Multipartism?: The Impact of the Lijst Pim Fortuyn, the Partij Voor De Vrijheid and the Socialistische Partij on the Dutch Party System." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems, .