APA Style
Buku Pintar IELTS : Internasional English Launguage Testing System. (2015).
Yogyakarta:
B First.
Chicago Style
Buku Pintar IELTS : Internasional English Launguage Testing System.
Cet.6.
Yogyakarta:
B First,
2015.
Text.
MLA Style
Buku Pintar IELTS : Internasional English Launguage Testing System.
Cet.6.
Yogyakarta:
B First,
2015.
Text.
Turabian Style
Buku Pintar IELTS : Internasional English Launguage Testing System.
Yogyakarta:
B First,
2015.
Print.