tinbergen, j. (1962). the appraisal of investment projects: The semi input- output method. the institute of national planning.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিtinbergen, jan. The Appraisal of Investment Projects: The Semi Input- Output Method. cairo: the institute of national planning, 1962.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিtinbergen, jan. The Appraisal of Investment Projects: The Semi Input- Output Method. the institute of national planning, 1962.