Gaya APA
Exam practice english. (2004).
tempaterbit:
penerbit.
Gaya Chicago
Exam practice english.
Edisi.
tempaterbit:
penerbit,
2004.
Text.
Gaya MLA
Exam practice english.
Edisi.
tempaterbit:
penerbit,
2004.
Text.
Gaya Turabian
Exam practice english.
tempaterbit:
penerbit,
2004.
Print.