Alff, W. (1966). Michelets Ideen. Droz ; Minard.
Lua i Stíl Chicago (17ú heag.)Alff, Wilhelm. Michelets Ideen. Genève ; Paris: Droz ; Minard, 1966.
Lua MLA (8ú heag.)Alff, Wilhelm. Michelets Ideen. Droz ; Minard, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.