Correspondence (letter to the editor):Definition of age.

MLA

Fiss, Thomas, and Wolfgang Hoffmann. “Correspondence (Letter to the Editor):Definition of Age.” Deutsches Arzteblatt International, vol. 107, no. 50, Dec. 2010, pp. 899–900. EBSCOhost, https://doi.org/10.3238/arztebl.2010.0899b.

APA

Fiss, T., & Hoffmann, W. (2010). Correspondence (letter to the editor):Definition of age. Deutsches Arzteblatt International, 107(50), 899–900. https://doi.org/10.3238/arztebl.2010.0899b

Chicago

Fiss, Thomas, and Wolfgang Hoffmann. 2010. “Correspondence (Letter to the Editor):Definition of Age.” Deutsches Arzteblatt International 107 (50): 899–900. doi:10.3238/arztebl.2010.0899b.