Gaya APA
Business English Two. (1988).
Jakarta:
Linguaphone Institute Limited.
Gaya Chicago
Business English Two.
.
Jakarta:
Linguaphone Institute Limited,
1988.
Text.
Gaya MLA
Business English Two.
.
Jakarta:
Linguaphone Institute Limited,
1988.
Text.
Gaya Turabian
Business English Two.
Jakarta:
Linguaphone Institute Limited,
1988.
Print.