APA
E. G. Gregorich, . (1997). Soil Quality for Crop Production and Ecosystem Health. NETHERLAND: Elsevier Science.
Chicago
E. G. Gregorich, . 1997. Soil Quality for Crop Production and Ecosystem Health. NETHERLAND: Elsevier Science.
Harvard
E. G. Gregorich, . (1997). Soil Quality for Crop Production and Ecosystem Health. NETHERLAND: Elsevier Science.
MLA
E. G. Gregorich, . Soil Quality for Crop Production and Ecosystem Health. NETHERLAND: Elsevier Science. 1997.