Gaya APA
Riyanto, S. et al
(2010).
Developing Vocabulary Skills book 2
(
1)
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet. et al.
"Developing Vocabulary Skills book 2".
1
Yogyakarta:
Pustaka Pelajar,
2010.
Text.