Gaya APA
Riyanto, S., Suryani, L.
(2021).
The Complete Book Of The IELTS Preparation
.
Yogyakarta:
ANDI.
Gaya MLA
Riyanto, Slamet., Suryani, Laila.
"The Complete Book Of The IELTS Preparation".
Yogyakarta:
ANDI,
2021.
Text.