Grässlin, K. (2000). Ed Johnson: Selections from hard Country and Optimist's Park. Kunstverein Braunschweig.
Lua i Stíl Chicago (17ú heag.)Grässlin, Karola. Ed Johnson: Selections from Hard Country and Optimist's Park. Braunschweig: Kunstverein Braunschweig, 2000.
Lua MLA (8ú heag.)Grässlin, Karola. Ed Johnson: Selections from Hard Country and Optimist's Park. Kunstverein Braunschweig, 2000.
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