Gaya APA
Setyarini. (2007).
Succesful english for business .
Yogyakarta:
Andi.
Gaya Chicago
Setyarini.
Succesful english for business.
Yogyakarta:
Andi,
2007.
Text.
Gaya MLA
Setyarini.
Succesful english for business.
Yogyakarta:
Andi,
2007.
Text.
Gaya Turabian
Setyarini.
Succesful english for business.
Yogyakarta:
Andi,
2007.
Print.