Gaya APA
Riyanto, S.
(2008).
Structure and written Expression Toefl Test
(
Cet.1)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"Structure and written Expression Toefl Test".
Cet.1
Yogyakarta:
Pustaka Pelajar,
2008.
Textbook.