linsel, h., & sack, k. (1965). theoretical problems of investment planning. National Planning Institute.
Cita Chicago Style (17a ed.)linsel, hermann, y kurt sack. Theoretical Problems of Investment Planning. cairo: National Planning Institute, 1965.
Cita MLA (9a ed.)linsel, hermann, y kurt sack. Theoretical Problems of Investment Planning. National Planning Institute, 1965.