Soil Science Society of America, American Society of Agronomy Division A-5, & Doran, J. W. (1994). Defining soil quality for a sustainable environment: Procceedings of a symposium sponsored by Divisions S-3, S-6, and S-2 of the Soil Science Society of America, division A-5 of the American Society of Agronomy, and the North Central Region Committee on Soil Organic Matter (NCR-59) in Minneapolis, MN, 4-5 November 1992. Soil Science Society of America, Inc.; American Society of Agronomy, Inc..
Παραπομπή σε μορφή Chicago (17η εκδ.)Soil Science Society of America, American Society of Agronomy Division A-5, και John Walsh Doran. Defining Soil Quality for a Sustainable Environment: Procceedings of a Symposium Sponsored by Divisions S-3, S-6, and S-2 of the Soil Science Society of America, Division A-5 of the American Society of Agronomy, and the North Central Region Committee on Soil Organic Matter (NCR-59) in Minneapolis, MN, 4-5 November 1992. Madison, Wisconsin: Soil Science Society of America, Inc.; American Society of Agronomy, Inc., 1994.
Παραπομπή σε μορφή MLA (9th εκδ.)Soil Science Society of America, et al. Defining Soil Quality for a Sustainable Environment: Procceedings of a Symposium Sponsored by Divisions S-3, S-6, and S-2 of the Soil Science Society of America, Division A-5 of the American Society of Agronomy, and the North Central Region Committee on Soil Organic Matter (NCR-59) in Minneapolis, MN, 4-5 November 1992. Soil Science Society of America, Inc.; American Society of Agronomy, Inc., 1994.