APA citiranje

Möckel, M., & Searle, J. (2014). Correspondence (letter to the editor): Difficult to Categorize. Deutscher Arzte Verlag.

Citação norma Chicago

Möckel, Martin, and Julia Searle. Correspondence (letter to the Editor): Difficult to Categorize. Deutscher Arzte Verlag, 2014.

MLA citiranje

Möckel, Martin, and Julia Searle. Correspondence (letter to the Editor): Difficult to Categorize. Deutscher Arzte Verlag, 2014.