Gaya APA
Hidayati, N, N. et al (2015).
IELTS Preparation: Lets Get The Highest Score For IELTS .
Yogyakarta:
Pustaka Baru Press.
Gaya MLA
Hidayati, Niswatin, Nurul. et al.
"IELTS Preparation: Lets Get The Highest Score For IELTS".
Yogyakarta:
Pustaka Baru Press,
2015.
Text.