Dougherty, J. E., & Pfaltzgraff, R. L. (1971). Contending theories of international relations. Lippincott.
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Chicago-čujuhus (17. p.)
Dougherty, James E., juo Robert L. Pfaltzgraff. Contending Theories of International Relations. Philadelphia: Lippincott, 1971.
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MLA-čujuhus (9. p.)
Dougherty, James E., juo Robert L. Pfaltzgraff. Contending Theories of International Relations. Lippincott, 1971.
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