Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
 Buku Teks
Locker, Kitty O.
Business and administrative communication
Richard D. 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
 Buku Teks SO
Locker, Kitty O.
Business and administrative communication
McGraw-Hill, 2013
 Buku Teks SO