Waetzoldt, S. (1970). Art treasures in Germany. Paul Hamlyn.
Lua i Stíl Chicago (17ú heag.)Waetzoldt, Stephan. Art Treasures in Germany. Paul Hamlyn, 1970.
Lua MLA (8ú heag.)Waetzoldt, Stephan. Art Treasures in Germany. Paul Hamlyn, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.