Hansen, J. R. (1986). Guide to practical project appraisal: Social benefit-cost analysis in developing countries. United Nations Industrial Development Organization.
芝加哥风格引文Hansen, John R. Guide to Practical Project Appraisal: Social Benefit-cost Analysis in Developing Countries. Vienna: United Nations Industrial Development Organization, 1986.
MLA引文Hansen, John R. Guide to Practical Project Appraisal: Social Benefit-cost Analysis in Developing Countries. United Nations Industrial Development Organization, 1986.
警告：这些引文格式不一定是100％准确.