Gaya APA
RIYANTO, S. et al
(2021).
The Completebook of the IELTS preparation
.
Yogyakarta:
Andi.
Gaya MLA
RIYANTO, Slamet. et al.
"The Completebook of the IELTS preparation".
Yogyakarta:
Andi,
2021.
Text.