APA Style
Riyanto, S.
(2010).
Developing Vocabulary Skills, Book 1
.
Yogyakarta:
Pustaka Pelajar, Yogyakarta.
MLA Style
Riyanto, Slamet.
"Developing Vocabulary Skills, Book 1".
Yogyakarta:
Pustaka Pelajar, Yogyakarta,
2010.
Buku Teks.