Shreeve, T. (1982). Discovering Ecology. Stonehenge, The American Museum of Natural History.
Lua i Stíl Chicago (17ú heag.)Shreeve, Tim. Discovering Ecology. London: Stonehenge, The American Museum of Natural History, 1982.
Lua MLA (9ú heag.)Shreeve, Tim. Discovering Ecology. Stonehenge, The American Museum of Natural History, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.