Dasmann, R. F., Freeman, P. H., & Milton, J. P. (1973). Ecological principles for economic development. published for the International Union for Conservation of Nature and Natural Resources (IUCN), Morges, Switzerland and the Conservation Foundation, Washington, D.C., USA; [by] John Wiley & Sons.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dasmann, Raymond Fredric, Peter H. Freeman, و John P. Milton. Ecological Principles for Economic Development. London, New York: published for the International Union for Conservation of Nature and Natural Resources (IUCN), Morges, Switzerland and the Conservation Foundation, Washington, D.C., USA; [by] John Wiley & Sons, 1973.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Dasmann, Raymond Fredric, et al. Ecological Principles for Economic Development. published for the International Union for Conservation of Nature and Natural Resources (IUCN), Morges, Switzerland and the Conservation Foundation, Washington, D.C., USA; [by] John Wiley & Sons, 1973.