APA (7th ed.) Citation

B, R., C, H., & G, G. (2013). Letter to the editor. Dove Medical Press.

Chicago Style (17th ed.) Citation

B, Ralla, Holtmann C, and Geerling G. Letter to the Editor. Dove Medical Press, 2013.

MLA (8th ed.) Citation

B, Ralla, et al. Letter to the Editor. Dove Medical Press, 2013.