Gaya APA
Riyanto, S.
(2002).
The Easy Way To Master English In a Few Days
.
Yogyakarta:
Pustaka Populer Obor.
Gaya MLA
Riyanto, Slamet.
"The Easy Way To Master English In a Few Days".
Yogyakarta:
Pustaka Populer Obor,
2002.
Text.