Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
 Buku Teks
Locker, Kitty O.
Business and administrative communication
McGraw-Hill, 2000
 Multimedia
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/Irwin, 2000
 Buku Teks