Schick, U. (2007). Werner Haypeter.
Lua i Stíl Chicago (17ú heag.)Schick, Ulrike. Werner Haypeter. Otterndorf, 2007.
Lua MLA (8ú heag.)Schick, Ulrike. Werner Haypeter. 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.