Dumont, R. A., & Lannon, J. M. (1987). Business communications (2nd ed.). Little, Brown.
Chicago-čujuhus (17. p.)Dumont, Raymond A., juo John M. Lannon. Business Communications. 2nd ed. Boston: Little, Brown, 1987.
MLA-čujuhus (9. p.)Dumont, Raymond A., juo John M. Lannon. Business Communications. 2nd ed. Little, Brown, 1987.
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