Boyer, P. S. (1993). The enduring vision: A history of the American people (2nd ed.). D.C. Heath and Co..
Chicago-čujuhus (17. p.)Boyer, Paul S. The Enduring Vision: A History of the American People. 2nd ed. Lexington: D.C. Heath and Co., 1993.
MLA-čujuhus (9. p.)Boyer, Paul S. The Enduring Vision: A History of the American People. 2nd ed. D.C. Heath and Co., 1993.
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