Lua APA (7ú heag.)

Geyer, H. (1991). Ulmer Kunst 91.

Lua i Stíl Chicago (17ú heag.)

Geyer, Hermann. Ulmer Kunst 91. Ulm, 1991.

Lua MLA (8ú heag.)

Geyer, Hermann. Ulmer Kunst 91. 1991.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.