Science Progress in the Twentieth Century (1906-1916). Sage Publications, Ltd.
Lua i Stíl Chicago (17ú heag.)Science Progress in the Twentieth Century (1906-1916). Sage Publications, Ltd.
Lua MLA (8ú heag.)Science Progress in the Twentieth Century (1906-1916). Sage Publications, Ltd.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.