(1993). D.D.R. Collectors reference guides: 1949-1990. Oliver.
Lua i Stíl Chicago (17ú heag.)D.D.R. Collectors Reference Guides: 1949-1990. Eton Wick: Oliver, 1993.
Lua MLA (8ú heag.)D.D.R. Collectors Reference Guides: 1949-1990. Oliver, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.