Gaya APA
Riyanto, S. (2004).
Gateway english trrough stories : a successful foreign language guide .
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"Gateway english trrough stories : a successful foreign language guide".
Yogyakarta:
Pustaka Pelajar,
2004.
Text.