Lal, R. (1999). Soil quality and soil erosion. CRC Press.
Chicago Style aipamenaLal, Rattan. Soil Quality and Soil Erosion. Boca Raton: CRC Press, 1999.
MLA aipamenaLal, Rattan. Soil Quality and Soil Erosion. CRC Press, 1999.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.