Hansen, J. R. (1978). Gudie to practical project appraisal: Social benefit- cost analysis in developing countries. Oxford I B H publishing company.
Chicago-tyylinen lähdeviittausHansen, J R. Gudie to Practical Project Appraisal: Social Benefit- Cost Analysis in Developing Countries. New Delhi: Oxford I B H publishing company, 1978.
MLA-viiteHansen, J R. Gudie to Practical Project Appraisal: Social Benefit- Cost Analysis in Developing Countries. Oxford I B H publishing company, 1978.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.