tinbergen, j. (1962). the appraisal of investment projects: The semi input- output method. the institute of national planning.
Չիկագոյի ոճի (17րդ խմբ.) մեջբերումtinbergen, jan. The Appraisal of Investment Projects: The Semi Input- Output Method. cairo: the institute of national planning, 1962.
MLA (9րդ խմբ.) Մեջբերումtinbergen, jan. The Appraisal of Investment Projects: The Semi Input- Output Method. the institute of national planning, 1962.