APA استشهاد

Hansen, J. R. (1978). Gudie to practical project appraisal: Social benefit- cost analysis in developing countries. Oxford I B H publishing company.

استشهاد بنمط شيكاغو

Hansen, J R. Gudie to Practical Project Appraisal: Social Benefit- Cost Analysis in Developing Countries. New Delhi: Oxford I B H publishing company, 1978.

MLA استشهاد

Hansen, J R. Gudie to Practical Project Appraisal: Social Benefit- Cost Analysis in Developing Countries. Oxford I B H publishing company, 1978.