Hansen, J. R. (1986). Guide to practical project appraisal: Social benefit-cost analysis in developing countries. United Nations Industrial Development Organization.
Citazione stile Chigago Style (17a edizione)Hansen, John R. Guide to Practical Project Appraisal: Social Benefit-cost Analysis in Developing Countries. Vienna: United Nations Industrial Development Organization, 1986.
Citatione MLA (9a ed.)Hansen, John R. Guide to Practical Project Appraisal: Social Benefit-cost Analysis in Developing Countries. United Nations Industrial Development Organization, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.