Nicholls, Y. I. (1973). Source book: Emergence of proposals for recompensing developing countries for maintaining environmental quality. International Union for Conservation of Nature and Natural Resources.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Nicholls, Yvonne I. Source Book: Emergence of Proposals for Recompensing Developing Countries for Maintaining Environmental Quality. Switzerland: International Union for Conservation of Nature and Natural Resources, 1973.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)Nicholls, Yvonne I. Source Book: Emergence of Proposals for Recompensing Developing Countries for Maintaining Environmental Quality. International Union for Conservation of Nature and Natural Resources, 1973.
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