Gaya APA
Riyanto, S.
(2008).
One Thousand (1000) Selected Verbs Used in Speaking English
.
:
Pustaka Pelajar.
Gaya MLA
Riyanto, Slamet.
"One Thousand (1000) Selected Verbs Used in Speaking English".
:
Pustaka Pelajar,
2008.
.