Gaya APA
English made easy. (2006).
Jakarta:
Kesaint Blanch.
Gaya Chicago
English made easy.
.
Jakarta:
Kesaint Blanch,
2006.
Text.
Gaya MLA
English made easy.
.
Jakarta:
Kesaint Blanch,
2006.
Text.
Gaya Turabian
English made easy.
Jakarta:
Kesaint Blanch,
2006.
Print.