linsel, h., & sach, k. (1965). practical problems of investment: Planning and financing. National Planning Institute.
Lua i Stíl Chicago (17ú heag.)linsel, hermann, agus kurt sach. Practical Problems of Investment: Planning and Financing. cairo: National Planning Institute, 1965.
Lua MLA (9ú heag.)linsel, hermann, agus kurt sach. Practical Problems of Investment: Planning and Financing. National Planning Institute, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.