Gaya APA
Rizka, H. et al
(2017).
Master Pocket IELTS
(
Cet.2)
.
Yogyakarta:
Cemerlang Publishing.
Gaya MLA
Rizka, Haira. et al.
"Master Pocket IELTS".
Cet.2
Yogyakarta:
Cemerlang Publishing,
2017.
Text.