Barron, S. (1988). German Expressionism 1915-1925: The second generation. Prestel.
Lua i Stíl Chicago (17ú heag.)Barron, Stephanie. German Expressionism 1915-1925: The Second Generation. München: Prestel, 1988.
Lua MLA (8ú heag.)Barron, Stephanie. German Expressionism 1915-1925: The Second Generation. Prestel, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.