Sharma, R.C., author
Business correspondence and report writing: a practical approach to business & technical communication
Tata McGraw-Hill, 2002
 Buku Teks
Webster's guide to business correspondence
Merriam-Webster, Inc., 1988
 Buku Teks
Merriam-Webster's guide to business correspondence : a merriam-webster
Merriam-Webster's, Incorporated, 1993
 Buku Referensi
Guffey, Mary Ellen, author
Essentials of business communication
PWS Publishing, 1991
 Buku Teks
Guffey, Mary Ellen, author
Essentials of business communication
PWS-Kent, 1988
 Buku Teks
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