(1951). Vol. 43, № 10; Industrial and Engineering Chemistry. 1951.
Lua i Stíl Chicago (17ú heag.)Vol. 43, № 10; Industrial and Engineering Chemistry. 1951, 1951.
Lua MLA (9ú heag.)Vol. 43, № 10; Industrial and Engineering Chemistry. 1951, 1951.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.