(2005). Works on paper: Max Beckmann, Carl Grossberg, Jean Hélion, Karl Hubbuch, Ludwig Meidner, Hanna Nagel, Rudolf Schlichter.
Čikaški stil citiranja (17. izdanje)Works on Paper: Max Beckmann, Carl Grossberg, Jean Hélion, Karl Hubbuch, Ludwig Meidner, Hanna Nagel, Rudolf Schlichter. München, 2005.
MLA način citiranja (8. izdanje)Works on Paper: Max Beckmann, Carl Grossberg, Jean Hélion, Karl Hubbuch, Ludwig Meidner, Hanna Nagel, Rudolf Schlichter. 2005.
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