Locker, Kitty O.
Business and administrative communication
McGraw-Hill/Irwin, 2000
 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
Ewald, Helen Rothschild
Business communication
Prentice-Hall International, 1997
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Treece, Marla
Succesful communication for business sand the profession
Allyn and Bacon, 1994
 Buku Teks SO