Παραπομπή σε μορφή APA (7η εκδ.)
Symposium on Defining soil quality for a sustainable environment (1992 : Minneapolis), American Society of Agronomy, Soil Science Society of America (SSSA), & Doran John W. (1994). Defining soil quality for a sustainable environment. Soil Science Society of America (SSSA).
Παραπομπή σε μορφή Chicago (17η εκδ.)
Symposium on Defining soil quality for a sustainable environment (1992 : Minneapolis), American Society of Agronomy, Soil Science Society of America (SSSA), και Doran John W. Defining Soil Quality for a Sustainable Environment. Soil Science Society of America (SSSA), 1994.
Παραπομπή σε μορφή MLA (9th εκδ.)
Symposium on Defining soil quality for a sustainable environment (1992 : Minneapolis), et al. Defining Soil Quality for a Sustainable Environment. Soil Science Society of America (SSSA), 1994.
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