Gaya APA
Express Your English. (2014).
Jakarta:
Laksana.
Gaya Chicago
Express Your English.
.
Jakarta:
Laksana,
2014.
Text.
Gaya MLA
Express Your English.
.
Jakarta:
Laksana,
2014.
Text.
Gaya Turabian
Express Your English.
Jakarta:
Laksana,
2014.
Print.