linsel, h., & sach, k. (1965). practical problems of investment: Planning and financing. National Planning Institute.
Chicago (17e ed.) Bronvermeldinglinsel, hermann, en kurt sach. Practical Problems of Investment: Planning and Financing. cairo: National Planning Institute, 1965.
MLA (9e ed.) Bronvermeldinglinsel, hermann, en kurt sach. Practical Problems of Investment: Planning and Financing. National Planning Institute, 1965.