Schlegel, F. (1998). Elfriede Stegemeyer. Photonews.
Lua i Stíl Chicago (17ú heag.)Schlegel, Franz-Xaver. "Elfriede Stegemeyer." Photonews 1998.
Lua MLA (8ú heag.)Schlegel, Franz-Xaver. "Elfriede Stegemeyer." Photonews, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.