Great Britain. Ministry of Overseas Development. (1977). A guide to the economic appraisal of projects in developing countries (Rev. ed.). H.M. Stationery Off.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Great Britain. Ministry of Overseas Development. A Guide to the Economic Appraisal of Projects in Developing Countries. Rev. ed. London: H.M. Stationery Off, 1977.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Great Britain. Ministry of Overseas Development. A Guide to the Economic Appraisal of Projects in Developing Countries. Rev. ed. H.M. Stationery Off, 1977.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.