Becker, D., & Becker, P. B. (1993). Speaking skills for business careers. Irwin Mirror Press.
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Chicago-čujuhus (17. p.)
Becker, Dennis, juo Paula Borkum Becker. Speaking Skills for Business Careers. Homewood, IL: Irwin Mirror Press, 1993.
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MLA-čujuhus (9. p.)
Becker, Dennis, juo Paula Borkum Becker. Speaking Skills for Business Careers. Irwin Mirror Press, 1993.
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