Woodruff, W. (1981). The struggle for world power 1500-1980. Macmillan.
Chicago-čujuhus (17. p.)Woodruff, William. The Struggle for World Power 1500-1980. London: Macmillan, 1981.
MLA-čujuhus (9. p.)Woodruff, William. The Struggle for World Power 1500-1980. Macmillan, 1981.
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