Wild, A. (1993). Soil and the Environment an Introduction - Alan Wild. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Wild, Alan. Soil and the Environment an Introduction - Alan Wild. Cambridge University Press, 1993.
Lua MLA (8ú heag.)Wild, Alan. Soil and the Environment an Introduction - Alan Wild. Cambridge University Press, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.