Gölz, F. (2010). Briefe an David. Compass-Infodienst : Online-Extra.
Lua i Stíl Chicago (17ú heag.)Gölz, Friedrich. "Briefe an David." Compass-Infodienst : Online-Extra 2010.
Lua MLA (8ú heag.)Gölz, Friedrich. "Briefe an David." Compass-Infodienst : Online-Extra, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.