STRAYER, J. R., GATZKE, H. W., & HARBISON, E. H. (1974). The mainstream of civilization since 1789. HBJ.
Chicago-čujuhus (17. p.)STRAYER, Joseph R., Hans W. GATZKE, juo E. Harris HARBISON. The Mainstream of Civilization Since 1789. New York: HBJ, 1974.
MLA-čujuhus (9. p.)STRAYER, Joseph R., et al. The Mainstream of Civilization Since 1789. HBJ, 1974.
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