Gaya APA
Indonesia in focus. (1990).
tempaterbit:
penerbit.
Gaya Chicago
Indonesia in focus.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya MLA
Indonesia in focus.
Edisi.
tempaterbit:
penerbit,
1990.
Text.
Gaya Turabian
Indonesia in focus.
tempaterbit:
penerbit,
1990.
Print.