Dragolov, G., Ignácz, Z. S., Lorenz, J., Delhey, J., Boehnke, K., & Unzicker, K. (2020). Social Cohesion in the Western World. 1st ed. 2016. Springer International Publishing.

Dragolov, Georgi, Zsófia S. Ignácz, Jan Lorenz, Jan Delhey, Klaus Boehnke, và Kai Unzicker. Social Cohesion in the Western World. 1st Ed. 2016. Springer International Publishing, 2020.

Dragolov, Georgi, et al. Social Cohesion in the Western World. 1st Ed. 2016. Springer International Publishing, 2020.