Gaya APA
Betsis, Andrew. (2011).
Succeed in IELTS (Cet. 1).
Jakarta:
Erlangga.
Gaya Chicago
Betsis, Andrew.
Succeed in IELTS.
Cet. 1
Jakarta:
Erlangga,
2011.
Text.
Gaya MLA
Betsis, Andrew.
Succeed in IELTS.
Cet. 1
Jakarta:
Erlangga,
2011.
Text.
Gaya Turabian
Betsis, Andrew.
Succeed in IELTS.
Cet. 1
Jakarta:
Erlangga,
2011.
Print.