Rumold, R. (2002). The Janus face of the German avant-garde: From expressionism toward postmodernism. Northwestern Univ. Press.
Lua i Stíl Chicago (17ú heag.)Rumold, Rainer. The Janus Face of the German Avant-garde: From Expressionism Toward Postmodernism. Evanston, ILL: Northwestern Univ. Press, 2002.
Lua MLA (8ú heag.)Rumold, Rainer. The Janus Face of the German Avant-garde: From Expressionism Toward Postmodernism. Northwestern Univ. Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.