Bovée, C. L. 2013. Business Communication Today (13th ed.). Upper Saddle River, NJ: Prentice Hall. (TSDAS Digital Library: HF5718 Bov [8th ed.])

Kelly, Marylin S. 2006. Communication @ Work: Ethical, Effective and Expressive Communication in the Workplace. Boston: Pearson / Allyn and Bacon.

Lesikar, Raymond Vincent. 2013. Business Communication: Making Connections in a Digital World (13th ed.). Boston: McGraw-Hill/Irwin. (TSDAS Digital Library: HF5721 Les)

Locker, K. And Kaczmarek, S.K. 2014. Business Communication: Building Critical Skills (6th ed.). New York: McGraw-Hill International, pp. 19 – 37. (TSDAS Digital Library: HF5718 Loc)