MLA

von dem Berge, Benjamin, et al. Measuring Intra-party Democracy. Springer Berlin Heidelberg, 2013.

APA

von dem Berge, B., Poguntke, T., Obert, P., & Tipei, D. (2013). Measuring Intra-Party Democracy. Springer Berlin Heidelberg.

Chicago

von dem Berge, Benjamin, Thomas Poguntke, Peter Obert, Peter Obert, Diana Tipei, and Diana Tipei. Measuring Intra-Party Democracy. : Springer Berlin Heidelberg, 2013.