Expert Consultation on Soil Conservation and Management in Developing Countries Rome, Italy, & Food and Agriculture Organization of the United Nations. Soil Resources, Development and Conservation Service. (1977). Soil conservation and management in developing countries: Report of an expert consultation held in Rome, 22-26 November 1976. Food and Agriculture Organization of the United Nations.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Expert Consultation on Soil Conservation and Management in Developing Countries Rome, Italy, و Development and Conservation Service Food and Agriculture Organization of the United Nations. Soil Resources. Soil Conservation and Management in Developing Countries: Report of an Expert Consultation Held in Rome, 22-26 November 1976. Rome: Food and Agriculture Organization of the United Nations, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Expert Consultation on Soil Conservation and Management in Developing Countries Rome, Italy, و Development and Conservation Service Food and Agriculture Organization of the United Nations. Soil Resources. Soil Conservation and Management in Developing Countries: Report of an Expert Consultation Held in Rome, 22-26 November 1976. Food and Agriculture Organization of the United Nations, 1977.