Boulding, K. E. (1988). The meaning of the 20th century: The great transition. Lanham: University Press of America.
Παραπομπή Chicago StyleBoulding, Kenneth E. The Meaning of the 20th Century: The Great Transition. Lanham: University Press of America, 1988.
Παραπομπή MLABoulding, Kenneth E. The Meaning of the 20th Century: The Great Transition. Lanham: University Press of America, 1988.
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