Gaya APA
Riyanto, S. et al
(2008).
developing grammar skills for the toeic test
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet. et al.
"developing grammar skills for the toeic test".
Yogyakarta:
Pustaka Pelajar,
2008.
Text Book.