APA-referens (7:e uppl.)

Verbeek, B., Zaslove, A., & Rooduijn, M. Italian populism: Toppling and re-building the party system twice. Absorbing the blow : populist parties and their impact on parties and party systems.

Chicago-referens (17:e uppl.)

Verbeek, Bertjan, Andrej Zaslove, och Matthijs Rooduijn. "Italian Populism: Toppling and Re-building the Party System Twice." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems .

MLA-referens (8:e uppl.)

Verbeek, Bertjan, et al. "Italian Populism: Toppling and Re-building the Party System Twice." Absorbing the Blow : Populist Parties and Their Impact on Parties and Party Systems, .