Não informado. (1988). Resource Recycling Plastics Recycling Update. Resource Recycling.
Lua i Stíl Chicago (17ú heag.)Não informado. Resource Recycling Plastics Recycling Update. Portland, Ore: Resource Recycling, 1988.
Lua MLA (8ú heag.)Não informado. Resource Recycling Plastics Recycling Update. Resource Recycling, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.