Gartside, L. [Leonard]
Model business letters : a classified selection of modern business letters for use in school and in business
Macdonald and Evans, 1982
 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, 1991
 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