APA (7th ed.) Citation

Vaccari, C., Valeriani, A., Barbera, P., Jost, J. T., Nagler, J., & Tucker, J. A. (2016). Of echo chambers and contrarian clubs: Exposure to political disagreement among German and Italian users of Twitter.

Chicago Style (17th ed.) Citation

Vaccari, Cristian, Augusto Valeriani, Pablo Barbera, John T. Jost, Jonathan Nagler, and Joshua A. Tucker. Of Echo Chambers and Contrarian Clubs: Exposure to Political Disagreement Among German and Italian Users of Twitter. 2016.

MLA (9th ed.) Citation

Vaccari, Cristian, et al. Of Echo Chambers and Contrarian Clubs: Exposure to Political Disagreement Among German and Italian Users of Twitter. 2016.

Warning: These citations may not always be 100% accurate.