APA Style
Riyanto, S.
(2011).
12 tenses to master in a day
(
cet1)
.
Yogyakarta:
Pustaka Pelajar.
MLA Style
Riyanto, Slamet.
"12 tenses to master in a day".
cet1
Yogyakarta:
Pustaka Pelajar,
2011.
Text.