Clark, Lyn R.
Business english and communication
McGraw-Hill, 2000
 Buku Teks SO
Business communication
by LaJuana Williams Lee ... [and others]
Houghton Miffiln, 1980
 Buku Teks SO
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Quible, Zone K.
Business Communication
Prentice-Hall International, 1996
 Koleksi Publik
Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
 Buku Teks