Locker, Kitty O., author
Business and administrative communication
McGraw-Hill, 2013
 Buku Teks
Locker, Kitty O., author
Business and administrative communication
Irwin, 1995
 Buku Referensi
Locker, Kitty O.
Business and administrative communication
McGraw-Hill, 2000
 Multimedia
Murphy, Herta A., author
Effective business communications
McGraw-Hill , 1984
 Buku Teks
Guffey, Mary Ellen, author
Essentials of business communication
PWS Publishing, 1991
 Buku Teks