Kenneth, J. (1977). The age of uncertainty (ed.). Houghton Mifflin Co..
Chicago-čujuhus (17. p.)Kenneth, John. The Age of Uncertainty. ed. Boston: Houghton Mifflin Co., 1977.
MLA-čujuhus (9. p.)Kenneth, John. The Age of Uncertainty. ed. Houghton Mifflin Co., 1977.
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