Não informado. (1976). Plastics and rubber. Plastics and Rubber Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Plastics and Rubber. London: Plastics and Rubber Institute, 1976.
Lua MLA (8ú heag.)Não informado. Plastics and Rubber. Plastics and Rubber Institute, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.