Hagen, E. E. (1964). On the theory of social change: How economic growth begins. Tavistock.
Chicago-čujuhus (17. p.)Hagen, Everett E. On the Theory of Social Change: How Economic Growth Begins. Londres: Tavistock, 1964.
MLA-čujuhus (9. p.)Hagen, Everett E. On the Theory of Social Change: How Economic Growth Begins. Tavistock, 1964.
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