United Nations. Industrial Development Organization, V. (1978). Guide to practical project appraisal: social benefit: Cost analysis in ... countries. Oxford and IBH Publishing Co.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited Nations. Industrial Development Organization, Vienna. Guide to Practical Project Appraisal: Social Benefit: Cost Analysis in ... Countries. Oxford and IBH Publishing Co, 1978.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited Nations. Industrial Development Organization, Vienna. Guide to Practical Project Appraisal: Social Benefit: Cost Analysis in ... Countries. Oxford and IBH Publishing Co, 1978.
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