APA (7th ed.) Citation

Eckardt, K., Sommerer, C., & Zeier, M. (2012). The German Chronic Kidney Disease (GCKD) study: Design and methods. Nephrology, dialysis, transplantation, 27(4), . https://doi.org/10.1093/ndt/gfr456

Chicago Style (17th ed.) Citation

Eckardt, Kai-Uwe, Claudia Sommerer, and Martin Zeier. "The German Chronic Kidney Disease (GCKD) Study: Design and Methods." Nephrology, Dialysis, Transplantation 27, no. 4 (2012). https://doi.org/10.1093/ndt/gfr456.

MLA (9th ed.) Citation

Eckardt, Kai-Uwe, et al. "The German Chronic Kidney Disease (GCKD) Study: Design and Methods." Nephrology, Dialysis, Transplantation, vol. 27, no. 4, 2012, https://doi.org/10.1093/ndt/gfr456.