Nuffield Foundation & Scottish Education Department. (1973). Metals stages 1 and 2: A unit for teachers. Published for the Schools Council by MacDonald Educational.
Lua i Stíl Chicago (17ú heag.)Nuffield Foundation agus Scottish Education Department. Metals Stages 1 and 2: A Unit for Teachers. London: Published for the Schools Council by MacDonald Educational, 1973.
Lua MLA (9ú heag.)Nuffield Foundation agus Scottish Education Department. Metals Stages 1 and 2: A Unit for Teachers. Published for the Schools Council by MacDonald Educational, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.