Gaya APA
Oxford progressive english course jilid 3. (1970).
tempaterbit:
penerbit.
Gaya Chicago
Oxford progressive english course jilid 3.
Edisi.
tempaterbit:
penerbit,
1970.
Text.
Gaya MLA
Oxford progressive english course jilid 3.
Edisi.
tempaterbit:
penerbit,
1970.
Text.
Gaya Turabian
Oxford progressive english course jilid 3.
tempaterbit:
penerbit,
1970.
Print.