United Nations United Nations. (1950). Formulation and Economic Appraisal of Development Projects: Book 2 (1.). Technical Assistance Administration training Institute on Economic Appraisal of Development Projects.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United Nations United Nations. Formulation and Economic Appraisal of Development Projects: Book 2. 1. United Nations: Technical Assistance Administration training Institute on Economic Appraisal of Development Projects, 1950.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)United Nations United Nations. Formulation and Economic Appraisal of Development Projects: Book 2. 1. Technical Assistance Administration training Institute on Economic Appraisal of Development Projects, 1950.
Cảnh báo: Các trích dẫn này có thể không phải lúc nào cũng chính xác 100%.