Locker, Kitty O., author
Business communication: building critical skills
McGraw-Hill, 2009
 Buku Teks
Locker, Kitty O., author
Business communication : building critical skills
McGraw-Hill, 2004
 Buku Teks
Brusino, Justin, author
Control that email!: business skills
American Society for Training & Development, 2007
 eBooks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Buku Teks
Quible, Zone K.
Business Communication
Prentice Hall International,inc, 1996
 Koleksi Publik
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