hansen, b. (1962). output- productivity and value added- productivity. the institute of national planning.
Cita Chicago (17th ed.)hansen, bent. Output- Productivity and Value Added- Productivity. cairo: the institute of national planning, 1962.
Cita MLA (9th ed.)hansen, bent. Output- Productivity and Value Added- Productivity. the institute of national planning, 1962.
Atenció: Aquestes cites poden no estar 100% correctes.