Gaya APA
Buku Pintar IELTS : Institute of English Language Training. (2011).
Bandung:
B First.
Gaya Chicago
Buku Pintar IELTS : Institute of English Language Training.
cet.2.
Bandung:
B First,
2011.
.
Gaya MLA
Buku Pintar IELTS : Institute of English Language Training.
cet.2.
Bandung:
B First,
2011.
.
Gaya Turabian
Buku Pintar IELTS : Institute of English Language Training.
Bandung:
B First,
2011.
.