Gaya APA
Practical english usage. (2016).
Tempat Terbit:
.
Gaya Chicago
Practical english usage.
.
Tempat Terbit:
,
2016.
Text.
Gaya MLA
Practical english usage.
.
Tempat Terbit:
,
2016.
Text.
Gaya Turabian
Practical english usage.
Tempat Terbit:
,
2016.
Print.