Gaya APA
WEST,Richard, ., SUSAN, D.
(1992).
Pitman Business English 1
(
1)
.
:
The Avi Publihshing.
Gaya MLA
WEST,Richard, ., SUSAN, DAVIES.
"Pitman Business English 1".
1
:
The Avi Publihshing,
1992.
Textbook.