Wild, A. (1993). Soil and the Environment an Introduction - Alan Wild. Cambridge University Press.
Chicago Style aipamenaWild, Alan. Soil and the Environment an Introduction - Alan Wild. Cambridge University Press, 1993.
MLA aipamenaWild, Alan. Soil and the Environment an Introduction - Alan Wild. Cambridge University Press, 1993.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.