Richter, D. d. (2001). Understanding soil change. Cambridge: Cambridge University Press.
Chicago Style aipamenaRichter, Daniel deBoucherville. Understanding Soil Change. Cambridge: Cambridge University Press, 2001.
MLA aipamenaRichter, Daniel deBoucherville. Understanding Soil Change. Cambridge: Cambridge University Press, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.