Gaya APA
Speaking : upper-intermediate study guide. (1992).
tempaterbit:
penerbit.
Gaya Chicago
Speaking : upper-intermediate study guide.
Edisi.
tempaterbit:
penerbit,
1992.
Text.
Gaya MLA
Speaking : upper-intermediate study guide.
Edisi.
tempaterbit:
penerbit,
1992.
Text.
Gaya Turabian
Speaking : upper-intermediate study guide.
tempaterbit:
penerbit,
1992.
Print.