Penggayaan APA
STUDENT Book 4. (2008).
England:
Pearson.
Chicago Style
STUDENT Book 4.
International Edition.
England:
Pearson,
2008.
Text.
MLA Style
STUDENT Book 4.
International Edition.
England:
Pearson,
2008.
Text.
Turabian Style
STUDENT Book 4.
England:
Pearson,
2008.
Print.