Gaya APA
Riyanto, S.
(2008).
The Easy Way To Master English In A Few Days
.
Yogyakarta:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"The Easy Way To Master English In A Few Days".
Yogyakarta:
Pustaka Pelajar,
2008.
Buku Tex.