Sommer, T. (2016). Art, Satz, Dada: Erik Spiekermann. Art.
Lua i Stíl Chicago (17ú heag.)Sommer, Tim. "Art, Satz, Dada: Erik Spiekermann." Art 2016.
Lua MLA (8ú heag.)Sommer, Tim. "Art, Satz, Dada: Erik Spiekermann." Art, 2016.
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