MLA

Janssen, Christian, et al. Health Care Utilization In Germany. Springer New York, 2014.

APA

Janssen, C., Ladebeck, N., Swart, E., & von Lengerke, T. (2014). Health Care Utilization in Germany. Springer New York.

Chicago

Janssen, Christian, Nadine Ladebeck, Enno Swart, and Thomas von Lengerke. Health Care Utilization In Germany. : Springer New York, 2014.