Hatfield, J. (1994). Soil biology: Effects on soil quality. Lewis Publishers.
Chicago Style aipamenaHatfield, J.L. Soil Biology: Effects on Soil Quality. Boca Raton: Lewis Publishers, 1994.
MLA aipamenaHatfield, J.L. Soil Biology: Effects on Soil Quality. Lewis Publishers, 1994.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.