Murphy, Herta A.
Effective business communications
McGraw-Hill, 1991
 Buku Teks SO
Weaver, Patricia C.
Persuasive writing : a manager’s guide to effective letters and reports
Free Press, 1977
 Buku Teks SO
Murphy, Herta A.
Effective business communications
McGraw-Hill, 1976
 Buku Teks SO
Murphy, Herta A.
Effective business communications
McGraw-Hill , 1984
 Buku Teks SO
Davis, Ken
Better business writing: a process approach / Ken Davis
Charles E. Merrill Publishing Company, 1983
 Buku Teks SO