Srein, Z. (1976). Planning the Volume of Investment the Long-run Period. The Institute of National Planning.
Chicago-referens (17:e uppl.)Srein, Zdenek. Planning the Volume of Investment the Long-run Period. Cairo: The Institute of National Planning, 1976.
MLA-referens (9:e uppl.)Srein, Zdenek. Planning the Volume of Investment the Long-run Period. The Institute of National Planning, 1976.