Gaya APA
Mars Helgesen, dkk.. (2010).
English firsthand access (Ed.1).
Hong Kong:
pearson longman.
Gaya Chicago
Mars Helgesen, dkk..
English firsthand access.
Ed.1
Hong Kong:
pearson longman,
2010.
Text.
Gaya MLA
Mars Helgesen, dkk..
English firsthand access.
Ed.1
Hong Kong:
pearson longman,
2010.
Text.
Gaya Turabian
Mars Helgesen, dkk..
English firsthand access.
Ed.1
Hong Kong:
pearson longman,
2010.
Print.