MLA

Michael Hertl, and Michael Hertl. Autoimmune Diseases of the Skin. Springer Vienna, 2011.

APA

Michael Hertl, M. Hertl, & Hertl, M. (2011). Autoimmune Diseases of the Skin. Springer Vienna.

Chicago

Michael Hertl, and Michael Hertl. Autoimmune Diseases of the Skin. : Springer Vienna, 2011.