Paucker, P. (1998). Two typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander.
Lua i Stíl Chicago (17ú heag.)Paucker, Pauline. Two Typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander. München, 1998.
Lua MLA (8ú heag.)Paucker, Pauline. Two Typographer-calligraphers: Berthold Wolpe and Elizabeth Friedlander. 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.