Gaya APA
CHAMOT, Anna Uhl. (2008).
Longman keystone: English learning system .
New Jersey:
pearson.
Gaya Chicago
CHAMOT, Anna Uhl.
Longman keystone: English learning system.
New Jersey:
pearson,
2008.
Text.
Gaya MLA
CHAMOT, Anna Uhl.
Longman keystone: English learning system.
New Jersey:
pearson,
2008.
Text.
Gaya Turabian
CHAMOT, Anna Uhl.
Longman keystone: English learning system.
New Jersey:
pearson,
2008.
Print.