Gaya APA
Suwito, R., Sularto, . (2008).
The Universe Of English 2 Elementary Level For Smk Grade Xi (Ed.1).
Jakarta:
Yudhistira.
Gaya MLA
Suwito, Ragil., Sularto, .
"The Universe Of English 2 Elementary Level For Smk Grade Xi".
Ed.1
Jakarta:
Yudhistira,
2008.
Text.