Gaya APA
Johan, Rita. (2014).
Business English .
Jakarta:
Grasindo.
Gaya Chicago
Johan, Rita.
Business English.
Jakarta:
Grasindo,
2014.
Text.
Gaya MLA
Johan, Rita.
Business English.
Jakarta:
Grasindo,
2014.
Text.
Gaya Turabian
Johan, Rita.
Business English.
Jakarta:
Grasindo,
2014.
Print.