Não informado. (1906). Science progress. Blackwell Scientific Publications.
Lua i Stíl Chicago (17ú heag.)Não informado. Science Progress. London: Blackwell Scientific Publications, 1906.
Lua MLA (8ú heag.)Não informado. Science Progress. Blackwell Scientific Publications, 1906.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.