Gaya APA
Objective english tests : certificate level. (1975).
tempaterbit:
penerbit.
Gaya Chicago
Objective english tests : certificate level.
Edisi.
tempaterbit:
penerbit,
1975.
Text.
Gaya MLA
Objective english tests : certificate level.
Edisi.
tempaterbit:
penerbit,
1975.
Text.
Gaya Turabian
Objective english tests : certificate level.
tempaterbit:
penerbit,
1975.
Print.