Gaya APA
Riyanto, S. (2009).
English for your better future : speak english, please 2 (Cet. 2).
Yogyakarta:
Pustaka belajar.
Gaya MLA
Riyanto, Slamet.
"English for your better future : speak english, please 2".
Cet. 2
Yogyakarta:
Pustaka belajar,
2009.
BUKU TEKS.