Gaya APA
window on the world. (1999).
Jakarta:
Penerbit Erlangga.
Gaya Chicago
window on the world.
.
Jakarta:
Penerbit Erlangga,
1999.
Text.
Gaya MLA
window on the world.
.
Jakarta:
Penerbit Erlangga,
1999.
Text.
Gaya Turabian
window on the world.
Jakarta:
Penerbit Erlangga,
1999.
Print.