linsel, h., & sack, k. (1965). theoretical problems of investment planning. National Planning Institute.
Chicago-čujuhus (17. p.)linsel, hermann, juo kurt sack. Theoretical Problems of Investment Planning. cairo: National Planning Institute, 1965.
MLA-čujuhus (9. p.)linsel, hermann, juo kurt sack. Theoretical Problems of Investment Planning. National Planning Institute, 1965.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.