Goodman, N. (1983). Fact, fiction, and forecast (4th ed.). Cambridge, Mass.: Harvard University Press.
Παραπομπή Chicago StyleGoodman, Nelson. Fact, Fiction, and Forecast. 4th ed. Cambridge, Mass.: Harvard University Press, 1983.
Παραπομπή MLAGoodman, Nelson. Fact, Fiction, and Forecast. 4th ed. Cambridge, Mass.: Harvard University Press, 1983.
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