Gaya APA
Kahhar, J, S., Indri, .
(2012).
Toefl Preparation
.
Yogyakarta:
Klik Publising.
Gaya MLA
Kahhar, Joko, S., Indri, .
"Toefl Preparation".
Yogyakarta:
Klik Publising,
2012.
Text.