Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
Buku Teks
Locker, Kitty O.
Business and administrative communication
McGraw-Hill, 2013
Buku Teks
Locker, Kitty O.
Business and administrative communication
Irwin, 1995
Buku Referensi
Locker, Kitty O.
Business and administrative communication
McGraw-Hill, 2000
Multimedia
Baird, John W.
Business communication : strategies and solutions
McGraw-Hill, 1983
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