Gaya APA
Business English Practice Book 2. (1989).
Jakarta:
Binarupa Aksara.
Gaya Chicago
Business English Practice Book 2.
.
Jakarta:
Binarupa Aksara,
1989.
Text.
Gaya MLA
Business English Practice Book 2.
.
Jakarta:
Binarupa Aksara,
1989.
Text.
Gaya Turabian
Business English Practice Book 2.
Jakarta:
Binarupa Aksara,
1989.
Print.