Upton, M. (1976). Agricultural production economics and resource-use. Oxford University Press.
Chicago Style aipamenaUpton, M. Agricultural Production Economics and Resource-use. London ; New York: Oxford University Press, 1976.
MLA aipamenaUpton, M. Agricultural Production Economics and Resource-use. Oxford University Press, 1976.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.