Rössing, R. (1984). Sofia. Brockhaus.
Lua i Stíl Chicago (17ú heag.)Rössing, Renate. Sofia. Leipzig: Brockhaus, 1984.
Lua MLA (8ú heag.)Rössing, Renate. Sofia. Brockhaus, 1984.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.