Seglin, Jeffrey L.
The AMA handbook of business letters
[American Management Association, American Management Association], 2002
 eBooks
Seglin, Jeffrey L.
The AMA handbook of business letters
[American Management Association;;;, ], 2012
 eBooks
Seglin, Jeffrey L., 1956-
The AMA Handbook of Business Letters / Jeffrey L. Seglin, Edward Coleman
Amacom, 2012
 Buku Teks
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
Meyer, Harold E.
Lifetime encyclopedia of letters
Prentice-Hall, 1992
 Buku Referensi