Não informado. (1973). Delft progress report. Delft University Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Delft Progress Report. Delft, Holanda: Delft University Press, 1973.
Lua MLA (8ú heag.)Não informado. Delft Progress Report. Delft University Press, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.