APA
Norman D., Douglas M. & Food and Agriculture Organization of the United Nations. (1994). Farming Systems Developments and Soil Conservation. Food and Agriculture Organization of the United Nations: .
Chicago
Norman D, Douglas M and Food and Agriculture Organization of the United Nations. 1994. Farming Systems Developments and Soil Conservation. Food and Agriculture Organization of the United Nations: .
Harvard
Norman D., Douglas M. and Food and Agriculture Organization of the United Nations. (1994). Farming Systems Developments and Soil Conservation. Food and Agriculture Organization of the United Nations: .
MLA
Norman D, Douglas M and Food and Agriculture Organization of the United Nations. Farming Systems Developments and Soil Conservation. Food and Agriculture Organization of the United Nations: . 1994.