Ehrmann, M., & Kleinhanß, W. (2008). Review of concepts for the evaluation of sustainable agriculture in Germany and comparison of measurement schemes for farm sustainability. Inst. of Farm Economics.
Chicago-Zitierstil (17. Ausg.)Ehrmann, Markus, und Werner Kleinhanß. Review of Concepts for the Evaluation of Sustainable Agriculture in Germany and Comparison of Measurement Schemes for Farm Sustainability. Braunschweig: Inst. of Farm Economics, 2008.
MLA-Zitierstil (9. Ausg.)Ehrmann, Markus, und Werner Kleinhanß. Review of Concepts for the Evaluation of Sustainable Agriculture in Germany and Comparison of Measurement Schemes for Farm Sustainability. Inst. of Farm Economics, 2008.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.