Gaya APA
Riyanto, S.
(2010).
Developing Vocabulary Skills Book 1
(
Cetakan 1)
.
Yogyakarta:
Pustaka Belajar.
Gaya MLA
Riyanto, Slamet.
"Developing Vocabulary Skills Book 1".
Cetakan 1
Yogyakarta:
Pustaka Belajar,
2010.
Text.