Gaya APA
HIMSTREET, W, C., BATY, W, M.
(1990).
Business communications:
(
9th ed.)
.
Boston:
PWS-KENT Pubb..
Gaya MLA
HIMSTREET, William, C.., BATY, Wayne, Murlin.
"Business communications:".
9th ed.
Boston:
PWS-KENT Pubb.,
1990.
Buku.