Gaya APA
Riyanto, S.
(2021).
The Complete Book Of The IELTS Preparation
(
Ed.1)
.
Yogyakarta:
Andi.
Gaya MLA
Riyanto, Slamet.
"The Complete Book Of The IELTS Preparation".
Ed.1
Yogyakarta:
Andi,
2021.
Text.