linsel, h., & sach, k. (1965). practical problems of investment: Planning and financing. National Planning Institute.
Παραπομπή σε μορφή Chicago (17η εκδ.)linsel, hermann, και kurt sach. Practical Problems of Investment: Planning and Financing. cairo: National Planning Institute, 1965.
Παραπομπή σε μορφή MLA (9th εκδ.)linsel, hermann, και kurt sach. Practical Problems of Investment: Planning and Financing. National Planning Institute, 1965.