Norman, D. W. (1994). Farming systems development and soil conservation. Rome: Food and Agriculture Organization of the United Nations.
استشهاد بنمط شيكاغوNorman, D. W. Farming Systems Development and Soil Conservation. Rome: Food and Agriculture Organization of the United Nations, 1994.
MLA استشهادNorman, D. W. Farming Systems Development and Soil Conservation. Rome: Food and Agriculture Organization of the United Nations, 1994.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.