Gaya APA
RIYANTO, S.
(2010).
Developing vocabulary skills : Book 1
(
Cet. 1)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
RIYANTO, SLAMET.
"Developing vocabulary skills : Book 1".
Cet. 1
Yogyakarta:
Pustaka Pelajar,
2010.
Text.