Não informado. (1930). Manufacturing chemist. Hall Oak Press.
Lua i Stíl Chicago (17ú heag.)Não informado. Manufacturing Chemist. London: Hall Oak Press, 1930.
Lua MLA (8ú heag.)Não informado. Manufacturing Chemist. Hall Oak Press, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.