Boulding, K. E. (1964). The meaning of the twentieth century: The great transition. New York: Harper & Row.
Παραπομπή Chicago StyleBoulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. New York: Harper & Row, 1964.
Παραπομπή MLABoulding, Kenneth Ewart. The Meaning of the Twentieth Century: The Great Transition. New York: Harper & Row, 1964.
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