Hodgson, J. M. (1978). Soil sampling and soil description. Clarendon Press ; Oxford University Press.
Chicago Style aipamenaHodgson, John Michael. Soil Sampling and Soil Description. Oxford : New York: Clarendon Press ; Oxford University Press, 1978.
MLA aipamenaHodgson, John Michael. Soil Sampling and Soil Description. Clarendon Press ; Oxford University Press, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.