Gaya APA
L.Gartside, .
(1989).
MODERN BUSINESS CORESPONDENCE
(
Edisi 4)
.
:
Binarupa Aksara.
Gaya MLA
L.Gartside, .
"MODERN BUSINESS CORESPONDENCE".
Edisi 4
:
Binarupa Aksara,
1989.
Bahasa.