Gaya APA
Understanding and using english. (1993).
tempaterbit:
penerbit.
Gaya Chicago
Understanding and using english.
Edisi.
tempaterbit:
penerbit,
1993.
Text.
Gaya MLA
Understanding and using english.
Edisi.
tempaterbit:
penerbit,
1993.
Text.
Gaya Turabian
Understanding and using english.
tempaterbit:
penerbit,
1993.
Print.