See Allo

Guffey, Mary Ellen, author

Essentials of business communication

PWS-Kent, 1988

Buku Teks

Guffey, Mary Ellen, author

Essentials of business communication

Cengage Learning Asia, 2008

Buku Teks

Guffey, Mary Ellen, author

Essentials of business communication

PWS Publishing, 1991

Buku Teks

Harvard business essentials : business communication

Boston : Harvard Business School Press, 2004,

Buku Teks

Ebert, Ronald J., author

Business essentials

Prentice-Hall, 2003

Buku Teks

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