Penrose, J. M. (2004). Business Communication for Managers (5th.). Cengage Learning.
Chicago-čujuhus (17. p.)Penrose, John M. Business Communication for Managers. 5th. New Delhi: Cengage Learning, 2004.
MLA-čujuhus (9. p.)Penrose, John M. Business Communication for Managers. 5th. Cengage Learning, 2004.
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