Paucker, P. (1998). Two typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander.
Čikaški stil citiranja (17. izdanje)Paucker, Pauline. Two Typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander. München, 1998.
MLA način citiranja (8. izdanje)Paucker, Pauline. Two Typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander. 1998.
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