Thill, John V.
Excellence in business communication/ John V. Thill, Courtland L. Bovee
McGraw-Hill, 1991
 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
Krizan, A.C.
Business communication
Thomson, 2008
 Buku Teks SO