hansen, b. (1965). marginal productivity wage theory and subsistence agriculture. the institute of national planning.
Παραπομπή σε μορφή Chicago (17η εκδ.)hansen, bent. Marginal Productivity Wage Theory and Subsistence Agriculture. cairo: the institute of national planning, 1965.
Παραπομπή σε μορφή MLA (9th εκδ.)hansen, bent. Marginal Productivity Wage Theory and Subsistence Agriculture. the institute of national planning, 1965.