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Bovée, C. L. 2013. Business Communication Today [1] (13th ed.). Upper Saddle River, NJ: Prentice Hall. (TSDAS Digital Library: HF5718 Bov [8th ed.])
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Kelly, Marylin S. 2006. Communication @ Work: Ethical, Effective and Expressive Communication in the Workplace. Boston: Pearson / Allyn and Bacon.
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Lesikar, Raymond Vincent. 2013. Business Communication: Making Connections in a Digital World [2] (13th ed.). Boston: McGraw-Hill/Irwin. (TSDAS Digital Library: HF5721 Les)
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Locker, K. And Kaczmarek, S.K. 2014. Business Communication: Building Critical Skills [3](6th ed.). New York: McGraw-Hill International, pp. 19 – 37. (TSDAS Digital Library: HF5718 Loc)