Ewers-Schultz, I. (2015). August Macke: Ina Ewers-Schultz. Wienand.
Lua i Stíl Chicago (17ú heag.)Ewers-Schultz, Ina. August Macke: Ina Ewers-Schultz. Köln: Wienand, 2015.
Lua MLA (8ú heag.)Ewers-Schultz, Ina. August Macke: Ina Ewers-Schultz. Wienand, 2015.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.