Engler, S., Gessler, T., Abou-Chadi, T., & Leemann, L. (2022). Democracy challenged: How parties politicize different democratic principles. Routledge.
Lua i Stíl Chicago (17ú heag.)Engler, S., T. Gessler, T. Abou-Chadi, agus L. Leemann. Democracy Challenged: How Parties Politicize Different Democratic Principles. Routledge, 2022.
Lua MLA (9ú heag.)Engler, S., et al. Democracy Challenged: How Parties Politicize Different Democratic Principles. Routledge, 2022.
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