linsel, h., & sack, k. (1965). theoretical problems of investment planning. National Planning Institute.
Chicago-viite (17. p.)linsel, hermann, ja kurt sack. Theoretical Problems of Investment Planning. cairo: National Planning Institute, 1965.
MLA-viite (9. p.)linsel, hermann, ja kurt sack. Theoretical Problems of Investment Planning. National Planning Institute, 1965.
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