Dumont, Raymond A.
Business communications
Little, Brown, 1985
Buku Teks
Murphy, Herta A.
Effective business communications
McGraw-Hill, 1991
Buku Teks
Murphy, Herta A.
Effective business communications
McGraw-Hill , 1984
Buku Teks
Archer, Robert M.
Basic business communications
Prentice-Hall, 1971
Buku Teks
Murphy, Herta A.
Effective business communications
McGraw-Hill, 1976
Buku Teks