Gaya APA
Kusuma, A.
(2015).
Practice Test Toefl: Audio, script, kunci, & Pembahasan
.
Solo:
Genta Smart Publisher.
Gaya MLA
Kusuma, Alvina.
"Practice Test Toefl: Audio, script, kunci, & Pembahasan".
Solo:
Genta Smart Publisher,
2015.
Hanbook.