Murphy, Herta A., author
Effective business communications
McGraw-Hill, 1991
 Buku Teks
Gartside, L. (Leonard), author
Model business letters : a classified selection of modern business letters for use in school and in business
Macdonald and Evans, 1982
 Buku Teks
King, F.W
English business letters : commercial correspondence for foreign students/F.W. King, D. Ann Cree.
Longmans , 1979
 Buku Teks
Davis, Ken
Better business writing: a process approach / Ken Davis
Charles E. Merrill Publishing Company, 1983
 Buku Teks
Chappel, R.T., author
Business communications
Macdonald and Evans, 1976
 Buku Teks
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