Gaya APA
Speaking : student's book. (2005).
tempaterbit:
penerbit.
Gaya Chicago
Speaking : student's book.
Edisi.
tempaterbit:
penerbit,
2005.
Text.
Gaya MLA
Speaking : student's book.
Edisi.
tempaterbit:
penerbit,
2005.
Text.
Gaya Turabian
Speaking : student's book.
tempaterbit:
penerbit,
2005.
Print.