Gaya APA
Riyanto, S.
(2007).
The 1st Student's Choice TOEFL
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"The 1st Student's Choice TOEFL".
Yogyakarta:
Pustaka Pelajar,
2007.
Text.