Hudson, N. (1981). Soil conservation. New York: Cornell Univ. Press.
Chicago Style CitationHudson, Norman. Soil Conservation. New York: Cornell Univ. Press, 1981.
Cita MLAHudson, Norman. Soil Conservation. New York: Cornell Univ. Press, 1981.
Atenció: Aquestes cites poden no estar 100% correctes.