Mayer, R. (1990). Kaplan: Graphik ; 1937-1980 / Rudolf Mayer.
Lua i Stíl Chicago (17ú heag.)Mayer, Rudolf. Kaplan: Graphik ; 1937-1980 / Rudolf Mayer. Dresden, 1990.
Lua MLA (8ú heag.)Mayer, Rudolf. Kaplan: Graphik ; 1937-1980 / Rudolf Mayer. 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.