Nuffield Foundation. Science Teaching Project. (1971). Nuffield biological science: Teachers' guide II. Nuffield Foundation.
Lua i Stíl Chicago (17ú heag.)Nuffield Foundation. Science Teaching Project. Nuffield Biological Science: Teachers' Guide II. England: Nuffield Foundation, 1971.
Lua MLA (9ú heag.)Nuffield Foundation. Science Teaching Project. Nuffield Biological Science: Teachers' Guide II. Nuffield Foundation, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.